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what happen if my user grow x10 or
x100 times? is the server going to
crash? there any tip you can suggest
on manage something like that?Your server could crash/get slow as hell because of extensive memory/cpu usage. You should use a message queue like redis/beanstalkd/gearmand to throttle your email alerts. My preference goes out to redis. use theblocking pop/pushwithpredislibrary which support blocking pop/push.there is any way to protect my file
cron/nightly_script.php to be executed
form outside calling it in the url of
the browser? consider tham im using a
string in crontab like:Don't use cron if you want to scale. Instead create couple of daemons.1 to schedule sending messages(this part could also be cron) to message queue,1 to process messages send to message queue.Daemons don't need to be spawned each time and spawning processes is (relative) expensive. Second your script should not call any URL anymore but instead call the PHP scripts directly(CLI).what about the email blast? for each
query if the query has results the
script sends an email, so it means a
blast of emails...is it going to be
considered spam automatically and then
i could blacklisted?When using a message queue you can throttle yourself!
|
I built an email alert for my users (now are only 2,000)
so every night a crontab execute a php script that query the mysql to find matches with user's saved search. it's a classified website in my case, but i would like to learn in case i had to build something for bigger clientsmy concerns are:what happen if my user grow x10 or
x100 times? is the server going to
crash? there any tip you can suggest
on manage something like that?there is any way to protect my file
cron/nightly_script.php to be
executed form outside calling it in
the url of the browser? consider
tham im using a string in crontab
like:lynx [absolute url/script.php]what about the email blast? for each
query if the query has results the
script sends an email, so it means a
blast of emails...is it going to be
considered spam automatically and
then i could blacklisted?thanks!!!
|
Email Alerts on saved searches, procedure and safety/performance tips&tricks?
|
I would recommend just usingevery 5 minutes synchronizedin the cron.yaml, and then just terminate immediately in the handler if the exact time is not to your liking (hour before 9 or after 20 and minute// 5is odd, for example). GAE'scronis not very sophisticated, but running a trivial handler which just gets the time, checks whether that's OK, and terminates immediately otherwise, is pretty simple and cheap (and the 70 or so "extra hits per day", each with a trivial amount of resource consumption, will hardly make a difference to your app's overall resource consumption anyway).
|
How to config a cron job to run every 5 minutes between 9:00am~20:00pm,
but every 10 minutes in other time of the day.
|
How to set Google App Engine cron job using different interval in different period of time?
|
You need to store somewhere the fact that it has text you and when this last occurred. You could do this using a plain file and by reading the files modification date to see when the text was last sent or you can use a database.
|
I'm in charge of a printer, so I wrote a script which runs every 5 minutes and figures out if the printer has paper. If it doesn't, the script will text me. The problem is, if I'm busy, and can't fill the printer, I don't want the script to continue to text me every 5 minutes. Is there a way I can force it to only send me at most 1 text every 8 hours or so, to ensure that the script doesn't text me twice for the same out-of-paper situation? The only thing I can currently think of is to create a db of times that I get texts, then make sure that the most recent one wasn't too long ago, or to create a local file with the most recent time in it.Thanks!
|
cronjob delaying based on PHP output
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If/home/myuser/bin/runreportis a script, add the following two lines to the top:env
set -xand change thecrontabline to:. /home/myuser/.bashrc ; /home/myuser/bin/runreport >/tmp/qq 2>&1Then, when it runs, you should have all the environment variables, and the commands that were run, in the/tmp/qqfile.If itisn'ta script, make a script that calls it and add theenvline to it. That will at least give you the environment you're running in.
|
I'm trying to write a cron job that runs a report, and emails the result to an address defined in my user's ~/.bashrc file. I had this working perfectly on Fedora, but when I switched to Ubuntu, my solution no longer works. The command my cron job currently runs is:. /home/myuser/.bashrc; /home/myuser/bin/runreportIf I run that command manually, or start it via Gnome-Schedule, it works perfectly, but it never seems to run. Is there something specific to Ubuntu that would be blocking this from running?Output of crontab -l:0 8 * * * . /home/myuser/.bashrc; /home/myuser/bin/runreport # JOB_ID_1Output of grep -i cron /var/log/syslog:Aug 4 08:00:00 localhost CRON[23234]: (myuser) CMD (. /home/myuser/.bashrc; /home/myuser/bin/runreport # JOB_ID_1)
|
Writing a Cron Job That Can Access User Data
|
I'm not sure if I'm missing something in your question. But it should be fairly simple with urllib2:import urllib2
request = urllib2.Request('http://example.com/path')
response = urllib2.urlopen(request)
content = response.read()
# now make the second request, just as aboveSee the page,urllib2 The Missing Manualfor more help with the urllib2 module.
|
I need a python script to perform a GET request on 2 urls.I will use these scripts in a cron job on my ubuntu server.The catch is, the 2 calls have to happen sequentially because the first GET request to Url#1 might take up to 1 minute or so to complete.For the cron job, I want it to run every 30 minutes.
|
Python script to do a GET request on 2 urls in a cron job
|
Generally your cron scripts are going to be run under a different user account, and probably have a different environment path set up.Try setting your command lines to use the full path to the command, ie./path/to/notify-send "x New Posts".You can usewhich notify-sendfrom your regular terminal to get the path to put into your script.You can also grab the output from your command to help debugging. Use of the backtick operator will return the output, so you can assign it to a variable and/or dump it.$output = `$command`;
error_log($output);
|
I have a cron job running a PHP script every five minutes; the PHP script executes two bash commands at the end of the script. I know the script is running due to a log file it appends to. When I run the PHP script manually via the Ubuntu Gnome Terminal both bash commands execute flawlessly; however when the PHP script is triggered via cron, the two bash commands are not ran. Any ideas?$command = 'notify-send "' . count($infoleakPosts) . ' New Posts."';
`$command`;
$command = 'firefox http://example.com';
`$command`;
*/1 * * * * php /home/andrew/grab.php USERNAME PASSWORD # JOB_ID_1
|
Bash commands not executed when through cron job - PHP
|
Example usingurllib:import urllib
import os
URL = 'http://someurl.com/foo/bar'
DIRECTORY = '/some/local/folder'
# connect to a URL, and that URL will return a number like 1200.
number = int(urllib.urlopen(URL).read())
# Use the number, to download xml files named:
# 1 to x where x is the number from #1.
# store the files in a particular directory.
for n in xrange(1, number + 1):
filename = '%d.xml' % (n,)
destination = os.path.join(DIRECTORY, filename)
urllib2.urlretrieve(URL + '/' + filename, destination)
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I need a python script that will do the following:connect to a URL, and that URL will return a number like 1200.Use the number, to download xml files named: 1 to x where x is the number from #1.store the files in a particular directory.Sorry I've never written a python script, so if you could guide me along that would be great (maybe with a some comments).I will be running this as a cron job if that matters.
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python script to download xml files on my server
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The #1 problem that anybody runs into with cron jobs is that usually, for security reasons, cron jobs run with a minimal$PATH. So, itcouldbe that your cron job runs with a different path than when you run the script from the shell, which would mean that it ispossiblethat within the cron job a differentmkdircomman gets called, which interprets its arguments differently.Usually, the first filename argument stops option processing and everything that comes after that will be treated as a filename. So, since#{HOST}is a filename, everything after that willalsobe treated as a filename, which means that the call will be interpreted as "make two directories, one named#{HOST}and the other named-p" If you look for example at the specification ofmkdir, it is simply illegal to pass an optionafterthe filenames.Another possibility is that for some reason#{HOST}will be empty when running under cron. Then the whole call expands tomkdir -p, which again, depending on your implementation ofmkdirmightbe interpreted as "create one directory named-p".It is not quite clear to me why you are passing the options and operands in the wrong order, instead ofmkdir -p #{HOST}. It's also not clear to me why you use the shellat all, instead of justFileUtils.mkdir_p(HOST).
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My ruby file is like this.`mkdir #{HOST} -p`It works fine by:ruby mycode.rbBut in a cron job0 * * * * ruby ~/backup.rb >> backup.logIt will a-pfolder. Why?
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Problem with running Ruby with Cron
|
I figured it out - curl's progress stats:(100 65622 0 65622 0 0 1039 0 --:--:-- 0:01:03 --:--:-- 1927)were being written to stderr for some reason - adding 2>&1 at the end of the command fixed it:2 * * * * /usr/bin/curl --basic --user 'user:pass' http://localhost/cron/do_some_action > /var/www/app/cronlog.log 2>&1Thanks to everyone for all the insight!
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Have the following cronjob set up in root's crontab: (centos 5.x)2 * * * * /usr/bin/curl --basic --user 'user:pass' http://localhost/cron/do_some_action > /var/www/app/cronlog.logInvoking the actual command works as expected, however when the cronjob runs, it always times out. I've usedset_time_limit()and related php.ini settings to ensure it's not PHP dying, and /var/log/cron looks normal to me:Jun 4 10:02:01 foobar crond[12138]: (root) CMD ([snip])Any ideas about why the cronjob would be dying?
|
cron job seems to be timing out
|
Well I came up with this solution similar to the PDO one. Are there any unforeseen problems with running this as a cron job?<?php
$con = mysql_connect("localhost","root","123456");
$throttle = 0;
$batch = 50;
$pause = 10; // seconds
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("maildb", $con);
// Message Table
$MSGresult = mysql_query("SELECT * FROM msgs");
// User Table
$USERresult = mysql_query("SELECT * FROM members");
while($MSGrow = mysql_fetch_array($MSGresult))
{
while($USERrow = mysql_fetch_array($USERresult))
{
mail($USERrow['email'],$MSGrow['subject'],$MSGrow['body']);
$throttle += 1;
if ($throttle > $batch ) { sleep($pause); $throttle = 0;}
}
mysql_data_seek($USERresult,0);
}
mysql_close($con);
?>
|
Let me rephrase my question, I have a mysql database that is holding emails to be sent, on a shared host. I would like to run a cron job that will read the database and sent out any messages in the database every 10 minutes or so.Now my question is, what is the best way with php to read my database and send out the emails in small batched so that I don't overwhelm the shared host.
|
PHP, Email and Cron
|
For Subversion usage your approach does not make sense and will not work:
Each Workingcopy stores its repository URL inside .svn folder, so if your IP changes you have to relocate your workingcopy via`svn switch --relocate`so it will not safe you any work. YOu really should use a dynamic DNS Service
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I am using a mac mini with a dynamic ip to store an SVN repository. As an unexpected change of the ip makes it difficult to consistently use the repository, I am interested in creating a cron to log the ip on another server every time it changes. What would be the best way to do this?
|
Cron to Log the ip of a repository with a dynamic ip
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Probably impossible to give a correct answer without more knowledge of the script and your system, so only general hints might be useful here:start with a minimal R script (a one liner) and confirm it works. By "works" I mean do something in the script you can check happened. Print a message to a log file, make a file in /tmp or something.make the script more complex until it fails. The last thing you did was the problemget the script to produce some output and make sure you can see it after it runs from CRON. Then you have a reliable method for debugging output and you can find out where the script failed.check system logs for messages from CRON - on my system these are in /var/log/syslog but this may vary.
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I'm attempting to schedule an R script that does a scrape, some calculations and then emails a small group of people twice a day. I've gotten the script working well but I can't seem to get the crontab to work. I've given full disk access to cron, I've put the script in a folder where I've expanded the access as much as possible and I've put the execution of the R script into a shell script. Everything has as much permissions as I can give it. When I run the command in terminal it works fine but it doesn't work in cron. Can anyone help shed some light on why this isn't working?The best I've been able to do is see R pop up in the activity monitor and then go away, so I'm assuming there's some issue with the script.Current crontab:0 * * * * /bin/bash /Users/billbachrach/cron_jobs/email_tests.shThis works in terminal:/bin/bash /Users/billbachrach/cron_jobs/email_tests.shShell file:#!/bin/sh
/usr/local/bin/Rscript /Users/billbachrach/cron_jobs/Craigslist_Good_Deal_Full_Script_V001.RI'd share the R script but it's fairly complex. It runs on its own flawlessly and from terminal as well.
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Crontab fails but command works in terminal
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Your script is probably running in a directory where it doesn't have permission to create or write to a file and so>biprod.txtis failing to create the file or to overwrite an existing file.Ifbiprod.txtis intended to only exist while your script is running then do this instead:biprod=$(mktemp) || exit 1
trap 'rm -f "$biprod"; exit' EXIT
dgmgrl -silent user/pass > "$biprod"
...
cat "$biprod" | ...though you almost certainly could be using< "$biprod" mail ...instead ofcat "$biprod" | mail ...). It wouldn't hurt for you to add someprintfs to report failures either.
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I wrote a shell script to automatically check the status of Oracle Data Guard and send it via mail.If I execute the script manually it works like it should.If I execute the script via a cronjob it just sends empty emails.
This behaviour started only after we updated our servers from oracle linux 7 to oracle linux 8.This is the script:#!/bin/bash
#. ~/envBIPROD.sh
source /home/oracle/.bash_profile
source /home/oracle/envBIPROD.sh
dgmgrl -silent user/pass >biprod.txt << EOF
show configuration;
show database p1biprod;
show database s1biprod;
EOF
cat biprod.txt | mail -r $(whoami).$(hostname -s)@hostname.tld -s "DATA GUARD Status biprod"[email protected]This is the "envBIPROD.sh" script which sets the oracle home:export ORACLE_SID=BIPROD1
export ORAENV_ASK=NO
. oraenv
export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:$PATHAlso the file "biprod.txt" is just empty when the script is run by cron.
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Cron job executing shell script sending empty email
|
EventBridge is the "cron" (it even supports cron format for the schedule), and AWS Lambda is the Python script. You would create an AWS Lambda function in Python, and configure EventBridge to trigger that function on a schedule.I suggest readingthe official tutorial.
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I'm new to using AWS so bear with me.I have a site hosted on S3 - it's an updating weather tracker map: index.html, data folder, and a python script to scrape and download files into that data folder.I tried setting up github actions to run the scrape every few hours to update the map, but it doesn't trigger. I'm wondering how I could setup something similar on AWS and what the equivalent process would be? I don't understand if I need to set up Lambda or EventBridge, if someone could clarify my options and what the steps are, that would be super helpful!Thanks!!!
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AWS equivalent to cron for updating an S3 site based on python script every few hours?
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If you're looking to write output to a specific terminal, you'd need to redirect it there, for example,* * * * * python script.py | tee -a script_times.log > /dev/pts/0. Replace/dev/pts/0with your terminal's device file, typically found using thettycommand
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I have a script running every minute on cron and want to output the script output to terminal as well as to a log file. I think I usetee -afor this.Right now the python script just prints the current time.* * * * * python script.py | tee -a script_times.logThe above logs to the file but not to stdout.I thoughtteeoutputs to stdoutandto any given file.How can I make it log out as well as log to file?
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Log cron process output to both stdout and log file?
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There is no need to query them first and then update. You can do the update in a single step.UPDATE pls SET minutes_left = minutes_left - 1If you don't want to go below 0 you can use a max function calledGREATEST().UPDATE pls SET minutes_left = GREATEST(minutes_left - 1, 0)or suggested by@topsailto decrease only those which are greater than 0.UPDATE pls SET minutes_left = minutes_left - 1 WHERE minutes_left > 0
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I have a database of a number of purchased plans with a value of minutes_left from which I want to subtract 1 number every minute.Now I am using thiscodeusing cron job:$sql = "SELECT * FROM pls";
$stmt = $pdo->query($sql);
while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$theM = $row['minutes_left'];
$realM = intval($theM) - 1;
$sqlE = "UPDATE pls SET minutes_left=?";
$stmtE = $pdo->prepare($sqlE);
$stmtE->execute([strval($realM)]);}But for example, if there are 27 minutes from one, and 12 minutes from another, and 15 minutes from another, all of them will change to 26, 25, etc., and each of them will not reduce theirs.
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subtract one from all rows every minute - sql php
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You need to specify the absolute path to your python executable for the cronjob.Assuming your project folder is in$HOME/myprojectand the virtual enviroment is in $HOME/myproject/.venv/, the python executable you need is something like$HOME/myproject/.venv/bin/python/You can also find it out by activating your virtual environment and typing inwhich pythonThe cronjob must then look something like this:*/10 * * * * /Users/username/myproject/.venv/bin/python3 /Users/username/myproject/manage.py read_create_earning_reports
|
I want to start my django project and execute every 10 min a BaseCommand. I wrote bash file it doesn't seem to work.
I have some cronjob code but I don't know if this is enough...*/10 * * * * python3 manage.py read_create_earning_reports...or activating the virtual environment for the crontab is neccessary.*/10 * * * * cd /Users/andreysaykin/Documents/project_distrokid/project_dk && source ../bin/activate && python3 manage.py myBaseCommandAfterwards I start my server.cd /my/django/project/path
source ../bin/activate
python3 manage.py runserverWhat my current Problem is that I am getting this Error:/Users/username/Documents/bash/myScript.sh: line 2: */10: No such file or directory
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Crontab inside a Bash file
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You cannot define expressions for the cronjob, so:cron: "0/${{ env.UPDATE_FREQ }} * * * *"Is invalid. Alternatively, you can set multiple schedules and then comparegithub.event.scheduleto your corn schedule if you want to perform a particular operation per ENV, for example (from the documentation):on:
schedule:
- cron: '30 5 * * 1,3'
- cron: '30 5 * * 2,4'
jobs:
test_schedule:
runs-on: ubuntu-latest
steps:
- name: Not on Monday or Wednesday
if: github.event.schedule != '30 5 * * 1,3'
run: echo "This step will be skipped on Monday and Wednesday"
- name: Every time
run: echo "This step will always run"See:https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedulehttps://github.com/orgs/community/discussions/25928
|
My attempt ofworkflow.yml:env:
UPDATE_FREQ: 15
on:
schedule:
- cron: "0/${{ env.UPDATE_FREQ }} * * * *"Gives an error:invalidcronattribute"0/${{ env.UPDATE_FREQ }} * * * *"
|
How to insert a repo environment variable into a github actions cron string
|
I don't believeOban.Plugins.Cronsupports granularity finer than one minute, by glancing atthe current code.One way you could do this is by having a process (like a GenServer) in your application that usesProcess.send_after/3or:timer.send_interval/2to periodically queue the Oban jobs you want. This is essentially whatOban.Plugins.Cronis doing. You'll probably want to pay attention to making sure the jobs are unique (documentation).Some very simplified code:defmodule MyApp.Scheduler do
use GenServer
def start_link(_) do
GenServer.start_link(__MODULE__, :no_args)
end
@impl true
def init(:no_args) do
:timer.send_interval(:timer.seconds(30), {:schedule_job, MyApp.Workers.W1, 30})
:timer.send_interval(:timer.seconds(20), {:schedule_job, MyApp.Workers.W2, 20})
{:ok, :no_state}
end
@impl true
def handle_info({:schedule_job, worker, unique_seconds}, state) do
%{my: :params}
|> Oban.Job.new(worker: worker, unique: [period: unique_seconds])
|> Oban.insert!()
{:noreply, state}
end
end
|
I'm using Oban for the ongoing tasks.# .....
{Oban.Plugins.Cron,
crontab: [
{"* * * * *", MyApp.Workers.W1},
{"* * * * *", MyApp.Workers.W2},
]},I now need to runW1andW2more frequently that every minute - around once in every 10...30 seconds. Since cron doesn't support higher frequency than 1/min, how would I get around this limitation? Preferably without hacks, unless absolutely necessary.I don't consider switching from Oban to other library.
|
How to make Oban run more frequently than once in a minute?
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This is how I would doCreate a commandphp artisan make:command DeleteSchedule<?php
// App\Console\Commands\DeleteSchedule
protected $signature = 'deleteschedule';
public function handle()
{
Model::where('created_at', '<', now()->subMonths(18))
->delete();
}Run a command every 1 day// App\Console\Kernel
protected function schedule(Schedule $schedule)
{
$schedule->command('deleteschedule')
->daily();
}
|
How can it be done after you set the expiration time of the record, it will be automatically deleted. After you set a specific duration older than 1 year or 6 months or 15 days it will automatically delete the record. What do I need?
|
Custom schedule deletion in Laravel
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You cant start a job indicating the seconds.
What you can do is delaying each job with sleep .
The pods of the cronjobs would start however together, but you can distributed the load of the jobs in this way.apiVersion: batch/v1
kind: CronJob
metadata:
name: myminutlyCronjob
spec:
schedule: "1 * * * *"
jobTemplate:
spec:
template:
spec:
containers:
- name: mycronjob
image: myjobImage
imagePullPolicy: IfNotPresent
command: ["/bin/sh", "-c"]
args:
- sleep 10;
mycronjobStartCommand;
restartPolicy: OnFailureHope this can help you.
|
I have a couple (at some point many) k8s cron jobs, each with schedules like*/5 * * * * # Every five minutes
*/1 * * * * # Every minute
*/1 * * * *
*/2 * * * * # Every two minutes
...My problem is that k8s seems to start them all at the top of the minute, so there might be a large number of jobs running at the same time. Each job only takes <10 seconds to run, so ideally, I would like to be able to distribute them over the span of a minute, i.e. delay their start.Any ideas how to do that, given that k8s does not second-based schedule expressions?
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Kubernetes CronJobs - not start at the top of the minute
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Maybe a little late.Problem:Running a python script with crontab in the background caused very slow performance (MacOs, M1 Sillicon)My Solution:Run the bash script, open a terminal and run the python script.Here an example.Run the script every day at 4 PMcrontab -e00 16 * * * path/to/the/bash_script.shThen, create your bash_script.sh#!/bin/bash
# Open a new terminal window and run the Python script
osascript -e 'tell application "Terminal" to do script "python python_script.py"'Finally, apply permissions:chmod +x bash_script.sh
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When I run a script through vscode it takes about 3s per loop where as cron takes 8-9.
macOS. Simple selenium Python script just finding elements and clicking. Same interpreter. I don’t know what to try. Apple silicon if it matters
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Why does selenium Python script run really slow in cron compared to vscode
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Best bet is to expand on the following code:Process process = new System.Diagnostics.Process ();
Process proc = new System.Diagnostics.Process ();
proc.StartInfo.FileName = "/bin/bash";
proc.StartInfo.Arguments = "-c \" " + command + " \"";
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardOutput = true;
proc.Start();This will get you started with executing bash commands and reading the output in your code.Alternatively, as Tristan mentioned in the comments, you can certainly read/write the cron files from your code as well.
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I've got a C# asp.net core app running on an Ubuntu box. I need to run some scheduled tasks and wanted some way to manage that from the app, rather than logging into a terminal.Is there anyway the C# app can connect to cron and return current jobs, add / edit existing ones?
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Is there anyway to access and edit Cron Jobs from a C# application?
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I am sorry that you can’t give variables or generate variables with random intervals instead of a fixed cron job . Because the following documentation has noted:"You can’t use pipeline variables when specifying schedules"Configure schedules to run pipelines - Azure Pipelines | Microsoft Learnpipeline variable constraintsYou may submit a suggestion at website below:feature request
|
I'm using the Azure pipeline to build and run my .NET console application on a Microsoft agent running synthetic monitoring. My project runs Selenium and pushes transactions to Log Analytics. This needs to run on a set interval time in an hour.I would like to have more fluid timing of schedules in the Azure pipeline. Can I give variables or generate variables with random intervals instead of a fixed cron job?Current situation- this gives an interval of fixed :15, :30, :45:- cron: '*/15 * * * *'
displayName: Measurement scheme
branches:
include:
- mainDesired situationint n = Random(0,15)
- cron: '$(n),$(n),$(n),$(n),$(n),$(n),$(n)...... * * * *'
displayName: Measurement scheme
branches:
include:
- main
|
Azure pipeline schedules with fluid cron job
|
Sunset time changes everyday, so you're going to have to retrieve it on a daily basis (I believe, I'm not an astronomer).I would create a lambda function that fetches the sunset time, and I would invoke this lambda function daily with an EventBridge rule (in the morning). This lambda function would use the retrieved sunset time to create another EventBridge rule via the boto3 api which invokes the lambda you already have at the desired time. You could also have the lambda function delete already existing rules when it runs before creating the new one.
|
I have a lambda function that I wanted to run everyday at sunset. I tried using eventbridge to trigger it every day and then usedtime.sleep()to wait until sunset, but it turns out lambda functions timeout after at most 15 minutes. And as I don't live near the equator, sunset throughout the year varies by more than that. Is there anyway to invoke a lambda function at every sunset? (Preferably it should be free as I'm trying to only use AWS free tier.)
|
How to invoke an AWS Lambda function at sunset?
|
I believe you would want the following cron jobcron: 0 8 8-14,22-28 * 6The logic behind this is the 2nd Saturday of the month must fall between days 8-14 and likewise the 4th Saturday to be between 22-28. You can test this by clicking the 3 dots on the pipeline and checking Schedule Runs. The problem with this is it only shows schedule runs within the next week so you would have to wait a while to confirm it works.As a quick test to check the scheduling, if you use the above but modify it to run on a Wednesday ( as we are already past the 4th Saturday in this month) you can see that it will trigger once this week on the 28th
|
I have a little testing project that I will need to compile and build every 2 weeks specifically on a Saturday.according to Microsoft Azure documentation I can use theschedulesand set my cron, so I did as follow:trigger : none
schedules:
- cron: '* 8 1/14 * 6'
displayName: Trigger every 2nd and 4th Saturday
branches:
include:
- test
always: trueBut this is not working as I expected as in the Azure devOps I couldn't see the triggers.Basically what I would like is for each month, this pipeline need to trigger on the 2nd Saturday and the fourth Saturday of the month (every 2 weeks on a Saturday).As far as I understand from the documentations, is hard to set the days if they are not in a weekly basis, so tried with the hours. To test this I used crontab guru. Basically I counted how many hours there are in 14 days and set the cron as follow:trigger : none
schedules:
- cron: '* 8/312 * * *'
displayName: Trigger every 2nd and 4th Saturday
branches:
include:
- test
always: trueBut this for some reason it shows that the next trigger will be tomorrow at 8 in the morning.I am quite confused at this point.Did anyone have any advice how I can guarantee that the trigger will always falls on a Saturday every 2 weeks please?Please, if my issue is not 100% clear, do not hesitate to ask more details.Thank you so so much for any help you can provide me with.
|
Azure yaml trigger pipeline every 14 days on a Saturday
|
Update 2024: It seems the bug has been fixed. Try simply:#!/usr/bin/env -S gitlab-rails runner
# Do your GitLab work here. This is just a harmless trivial example.
Project.find_each do |project|
puts "#{project.full_path}"
endI've expanded on theworkaroundto pipe the script to gitlab-rails on standard input which does work:#!/usr/bin/env ruby
#
# List GitLab projects
#
# Run this script with sudo
if not defined?(Rails) then
# Running in plain rubby, invoke rails runner and pipe the script into it, passing args
exec("/usr/bin/gitlab-rails", "runner", "-", *ARGV, :in=>[File.expand_path(__FILE__)])
end
# Do your GitLab work here. This is just a harmless trivial example.
Project.find_each do |project|
puts "#{project.full_path}"
endAfter making this script executablechown a+xI can put it in a cron job conveniently:00 * * * * root /path/to/my/script.rb
|
I have gitlab-rails withGitLab 15.0.4Rails version 6.1.4.7Ruby version ruby 2.7.5I want to run a gitlab-rails script from Cron. Thegitlab-rails runnerseems to be broken as it doesn't recognize the file argument and tries to run it as a script instead, which fails. So even if the shebang line suggested ingitlab-rails runner -hworked (which it doesn't on my system because args are not separated), gitlab-rails runner complains that the file path is not a valid script.I could include the ruby script in a shell script, pipe it to gitlab-rails, but sacrifices .rb file syntax highlighting and intelisense in editors.I could pipe the.rbscript from within a shell script into gitlab-rails. That would solve the previous, but now I have two scripts and shell is not reliable when it comes to referencing related scripts unless I give it the library path explicitly. That seems convoluted.Someonefolks have suggested workarounds. It involves running ruby as usual and then re-executing the script with rails (gitlab-rails in my case). This still fails because of the broken gitlab-rails runner which treats the file argument as a rails command...
|
How to run a cron script with gitlab-rails
|
First,@Scheduled(cron = "0 0 0 * * ?")triggers at 00:00:00 every day. The hourly schedule is defined as@Scheduled(cron = "0 0 * * * ?").Second, the@Scheduledimplementation in Spring andCronTriggeringPolicyin Log4j are completely separate and unrelated implementations of the same concept so what you experience is most likely a coincidence.One way to achieve the determined ordering of schedules could be shifting either of them by some amount from the hour start, e.g.@Scheduled(cron = "1 0 * * * ?")which will trigger at the first second of every hour allowing time for the daily log rollover to perform.
|
I have a cron schedule that runs log writing every hour.@Scheduled(cron = "0 0 0 * * ?")And every hour I use Log4j2's CronTriggeringPolicy to roll the logs up to the previous day.CronTriggeringPolicy schedule="0 0 0 * * ?"At this time, the question is, if the time of cron rolling the log and cron leaving the log are the same,Which one works first?The way I want it to work is that the rolling is done first, and a new log is written.In my experiments, rolling is the first thing that happens, but I don't know if it's a coincidence or what the system intended.
|
What is the CronTriggeringPolicy priority?
|
atis your friend.Using this loop will create a job for every point in time you need to run your script:awk '{for(i=3;i<=NF;i++){system("echo playsound.sh | at "$i" "$2" "$1)}}' < timetable.txt
|
this table I will be updated every month,
How I can linking the table with crontab to run a shell scripts?
-The table will be like this for all days in the month-1 Apr 4:59 6:25 12:41 16:13 18:56 20:26
2 Apr 4:58 6:23 12:40 16:13 18:57 20:27
3 Apr 4:58 6:23 12:40 16:13 18:57 20:27
4 Apr 4:55 6:21 12:40 16:13 18:58 20:28
5 Apr 4:54 6:20 12:40 16:14 18:59 20:29
6 Apr 4:52 6:18 12:39 16:14 19:00 20:30
7 Apr 4:51 6:17 12:39 16:14 19:00 20:30
8 Apr 4:49 6:16 12:39 16:14 19:01 20:31
9 Apr 4:48 6:15 12:38 16:14 19:02 20:32
10 Apr 4:47 6:13 12:38 16:14 19:02 20:32
|
Run CRON job 5 times a day as it is shown in the table
|
@rebootis too early in boot process IMHO. You should create a systemd script to wait network.As a workaround, you can add asleep 30or better:until ping -c1 domain.com &>/dev/null; do
sleep 5
donebefore your wget
|
I've read a load of similar cases and can't for the life of me figure this one out...I'm running a wget command inside a .sh script which is called from cron on reboot as follows:@reboot /home/user/reboot_script.shThe .sh script starts with#!/bin/bashAnd I have done chmod +x reboot_script.shThe line that fails is :Eithermac=$(</home/user/mac.txt)Which may not be providing the content to the variable in the wgetOR/usr/bin/wget "http://my.domain.com/$mac/line.txt" -O /home/user/line.txtIf I run the script from command line, it works absolutely fine but if it runs from the cron on reboot, the script runs, but line.txt is saved as an empty file (0 bytes). Again, if run directly from command line, it works fine.I've looked at file permissions, absolute paths, everything I can think of, but I've been staring at this for hours now.Any help would be appreciated. Thanks.
|
wget in script not working when called from cron
|
If this is your local user crontab, then when the script runs, the current directory is set to your home directory,/home/eric. You probably did something likesqlite3.connect('quotebot.db'). That file didn't exist, and sqlite3 is happy to create a new empty DB for you.If you need files outside of your home, you'll either have to use absolute paths, or derive the path of the script by usingos.path.dirname(__file__).
|
I'm working on a Python Twitter bot that works fine in the Python editor and my Raspberry Pi's terminal, but when I run it using cron, I get an error.crontab file:* * * * * /home/eric/code/quotebot/quotebot.py >> /home/eric/code/quotebot/logs/minute.log 2>&1Error message:Traceback (most recent call last):
File "/home/eric/code/quotebot/quotebot.py", line 22, in <module>
cursor.execute("SELECT MIN(countoftweets) FROM quotebot")
sqlite3.OperationalError: no such table: quotebotBecause it works when running from the terminal and IDE, I'm wondering if there's an issue with permissions or something else I'm not aware of. The table definitely exists and the database definitely exists.
|
Python Crontab Can't Read Sqlite3 Table
|
If this needs to be executed every 8 hours, then you can Schedule expressions using therateas providedhere.For CRON expression will be:0 0/8 * * ? *You can readheremore.
|
I am trying to use AWS Cloudwatch service. Inside that I am create a Synthetic Canary.And for the schedule I am inserting a cron job with value0 */8 * * *.Basically I want to execute it every 8 Hours, Every Day.But the AWS Cron checker tells that it is wrong expression. I've checked various links but everywhere same expression is there.I am not sure what is wrong with above expression.
|
Invalid CRON expression 0 */8 * * *
|
You can combine multiple@Scheduledannotations with@Schedulesannotation:@Schedules(value = {
@Scheduled(initialDelay = 15_000,
fixedDelay = Long.MAX_VALUE),
@Scheduled(cron = "0 */5 * * * *")
})
public void scheduleFixedDelayTask() {
System.out.println("Fixed delay task - " +
System.currentTimeMillis() / 1000);
}The task will be executed the first time after theinitialDelay(at 15 sec.) value. We make it impossible to repeat withfixedDelay = Long.MAX_VALUEbecause let cron do it.ORYou can use@PostConstructand@Scheduledannotation together:import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
@Component
public class ScheduleClass {
@PostConstruct
public void onStartup() {
scheduleFixedDelayTask();
}
@Scheduled(cron = "0 */1 * * * *")
public void scheduleFixedDelayTask() {
System.out.println("Fixed delay task - " +
System.currentTimeMillis() / 1000);
}
}Normally you don't need to add cron for a task that will run every 5 minutes but I'm assuming this is an example.
|
I've got a method:@Scheduled(cron="0 */5 * * * *")
public void syncRoutine() { }So it runs every 5 minutes.Is it possible to schedule a method to run immediately first time and then according to cron?
|
How to execute a @Scheduled method in java Spring immediately and then according to cron?
|
The issue is solved and able to inject the value in from Pipeline as well.Need to add double quotes for the value of cron in release pipeline, then the cron value will be put as is, it will not be splitted
|
I have one Timer trigger Azure function which runs on each 10 mins, cron is 0 */10 * * * *I want to make this cron configurable from Azure release pipeline while deployment.I have added the cron value in library variable like below,I have used the same library variable in App settings of release pipeline.If I try to deploy, it is showing the error in log like below.I understood the error. The error is because during deployment the corn is splitted like below. But not sure how to solve the error so that the corn will not be splitted. Find the below log from release log in bold.Trying to update App Service Application settings. "CornValue":"0","":"*"
|
Make timer trigger function cron configurable from Azure DevOps release pipeline
|
This is a complete command:sleep 120This is another complete command:aws ec2 stop-instances --instance-ids i-059You can't just smash multiple commands together like you are attempting. If you tried runningsleep 120 aws ec2 stop-instances --instance-ids i-059you would see an error message. That error message is also probably showing up in your server's cron log.The solution is to place a semicolon delimiter between the commands, like so:sleep 120 ; aws ec2 stop-instances --instance-ids i-059This tells the Linux shell to run the first command and wait for it to finish, then run the second command.
|
I am using crontab on a Linux ec2 to run some code when the instance starts.
The first two lines of the crontab run correctly, but I cannot make the instance stop after 120 seconds.@reboot python3 run.py
@reboot python3 run2.py
@reboot sleep 120 aws ec2 stop-instances --instance-ids i-059............If I run the was command in the terminal works without issues, is only in crontab that does not work.
|
How to stop ec2 with crontab at @reboot?
|
In order to achieve what you are looking for, you need two cron jobs:The first one will reboot the server at a given timeThe second one will be executed at reboot — with the@rebootmechanism of the crontabMind that the side effect of this is that your script will be executed at each reboot of that node, might it be during night, when the first cron reboots the node, or whenever the node reboots.This will give this playbook:- name: Scheduled reboot
cron:
name: "Reboot to launch /path/to/script"
minute: "0"
hour: "20"
user: root
job: "/sbin/reboot"
- name: Launch script after reboot
cron:
name: "Launch /path/to/script after reboot"
special_time: reboot
user: root
job: "/path/to/script"What you could do to be extra sure that the script is not executed in the middle of the day, though, is to verify the hour at the beginning of it, something like:#!/usr/bin/env sh
if [ "$(date +%H)" -lt 20 ]; then
exit 0
fi
|
I am trying to add a cron job to an ansible playbook. This job takes a long time and I need to run it during normal server off time. The script is as follows:- name: Set scheduled run
cron:
name: "cron run"
special_time: reboot
minute: "0"
hour: "20"
user: root
job: "/path/to/script"This works okay without thespecial_time: rebootbut when that is added i get the following error:"You must specify time and date fields or special time."
|
Ansible Cron special time "You must specify time and date fields or special time." error
|
How about using command line options?https://docs.python.org/3/library/argparse.htmlWhen triggering the script from cron use a special argument that defaults to something else if not explicitly set.
|
I created a python script which is usually run by a cron job, but the script can at times be run manually by a human. Is it possible to determine who ran the script and saved it in a log file?I'm using python'slogginglibrary. It seems theLogRecordattributesnameonly shows the root as being the logger used to log the call.log_format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
|
Log who ran a python script: cron or human?
|
I am using Gmail API to retrieve recent messages.Your trying to access private user data you need the consent of the user to do that.this is an impossible task. Because OAuth token expires.Tokens expire this is intentional if they didn't and someone got your token they could use it for ever by having an expiration time on the token this limits how long a hacker would have access to your data.Does anyone experience the same problem? If so, how did you guys overcome it?These are things you should not be trying to over come these are things you should accept and try to understand the security they bring to your application.I'm kinda stuck on this matter. and would love to hear a solution.If this is a google workspace domain account, you could consider using a service account.However if this is a standard google gmail user then you will need to use Oauth2 and request the consent of the user. If you have a refresh token you should not be having an issue you just need to authorize the user once and you will be able to request a new access token when ever you need.
|
I am using Gmail API to retrieve recent messages. And of course Gmail API requires OAuth2 Token to authenticate the requests. And repeat the task indefinitely every nth time.However, I think that this is an impossible task. Because OAuth token expires. Though it has a refresh token, It will still need initial user intervention to start the task.Does anyone experience the same problem? If so, how did you guys overcome it?I'm kinda stuck on this matter. and would love to hear a solution.
|
Laravel scheduler with task that requires OAuth2
|
Use-pruneto prevent going into a directory that matches some conditions.find /var/www -type d -name 'excluded-directory' -prune -o -name "*.htm*" -type f -mtime +30 -exec rm -f {} \;
|
I have a dir that is full of many htm reports that I keep around for 30 days and delete old ones via a cron, but there is one sub-dir I would like to keep longer. So this is the line I made in the cron, but how do I tell it to leave one sub-dir alone.5 0 * * * find /var/www -name "*.htm*" -type f -mtime +30 -exec rm -f {} \;Any help is greatly appreciated!
|
Delete files in dir but exclude 1 subdir
|
msg=$(curl -s --max-time 3 icanhazip.com) ||
msg='Internet unreachable'
echo "$(date '+%Y-%m-%d %T %Z'),${msg:-Unkown}" >> /home/eic/ip.report.csvEach line will look like:2022-02-21 14:59:59,12.123.123.12 UTCObviously, "Internet unreachable" means "icanhazip.com unreachable". Failing toifconfig.me, and/orping -c 1 -W 3 google.comto log connectivity, but not IP, may be worthwhile to reduce maintenance of an embedded device.I might even use a 5 second time out (instead of 3), for very slow connections, like bad satellite, proxies, etc.${msg:-Unkown}replaces an empty response withUnkown.You can change the date format:man date.Add2>/dev/nullto curl if you don't want cron to log errors it may produce (eg if internet is down).More info on checking internet connectivity from the shell:https://unix.stackexchange.com/questions/190513/shell-scripting-proper-way-to-check-for-internet-connectivity
|
I have an R script that gets the public IP bysystem("curl ifconfig.me",intern = T )and then
writes/appends it in a CSV filewrite.table(data.frame(start.script=start.time, runtime=round(Sys.time()-start.time,4), ip=myip), append = T, file = "/home/eic/ip.report.csv", row.names = F,sep = ",", col.names = !file.exists("/home/eic/ip.report.csv"))the script runs with cron every minute.However, i will be running it in an small raspberry Zero and the installation of R is almost 500MBis it possible to do this with bash?The output should create or append a CSV file with (time and public IP as strings). If the internet is not reachable , "Internet not reachable" should be output. It doesn't necessarily have to docurl ifconfig.meto check for internet connectivity . Checking for ping at8.8.8.8would be also an option. However it should output the public IP.Thanks
|
bash: output/write/append a csv file with timestamp and public IP
|
On Firebase/Google Cloud Functions the two most common options areeitherto store the schedule in a database and then periodically trigger a Cloud Function and run the tasks that are due,orto use Cloud Tasks to dynamically schedule a callback to a separate Cloud Function for each task.I recommend also reading:Doug's blog post onHow to schedule a Cloud Function to run in the future with Cloud Tasks (to build a Firestore document TTL)Fireship.io's tutorial onDynamic Scheduled Background Jobs in FirebaseHow can scheduled Firebase Cloud Messaging notifications be made outside of the Firebase Console?Previousquestions on dynamically scheduling functions, as this has been covered quite well before.Update(late 2022): there is now also a built-in way to schedule Cloud Functions dynamically:enqueue functions with Cloud Tasks.
|
I have a list of 10 time stamps which keeps on updating dynamically. In total there are 3 such lists for 3 users. I want to build a utility to trigger a function at the next upcoming time stamp. (preferably everything over server-less compute)I am stuck in finding out how to achieve this over aws or firebase
|
Creating dynamically scheduled functions
|
Try full path to the python and write the log for investigation:@reboot /usr/bin/python /home/pi/distance2.py > /home/pi/distance2_cronjoblog 2>&1
|
I have a python script on a Pi3 which sends sensor readings to a mysql database, which I would like to run at boot. I have tried several combinations of @boot within crontab, but the database table never gets any fresh data.The first line of the script is...#!/usr/bin/pythonand the script runs with:./distance2.py@reboot /home/pi/distance2.py &
# @reboot cd /pyhome/pi/Pimoroni/VL53L1X/Examples && sudo python distance2.py
# @reboot /home/pi/Pimoroni/VL53L1X/Examples/distance2.py &(I moved the script from the Pimoroni directory for the sake of simplicity.)When run from terminal, the script works perfectly:pi@raspberrypi:~ $ ./distance2.py
distance.py
Display the distance read from the sensor.
Uses the "Short Range" timing budget by default.
Press Ctrl+C to exit.
VL53L1X Start Ranging Address 0x29
VL53L0X_GetDeviceInfo:
Device Name : VL53L1 cut1.1
Device Type : VL53L1
Device ID :
ProductRevisionMajor : 1
ProductRevisionMinor : 15
Distance: 0mm
(1L, 'record inserted.')
Distance: 60mm
(1L, 'record inserted.')
Distance: 60mmgrep shows it's running OK (Unless the red colour of the script name text means something bad?)ps aux | grep distance2.py
pi 1530 0.0 0.5 7332 2032 pts/0 S+ 16:20 0:00 grep --color=auto distance2.pyWhat's crontab @boot got against my humble project?
|
crontab python script query
|
So I started having this issue as well, recently too.I've been doing a little digging, and so far what I have found is the following:Placing 'reboot' in a SU crontab does nothing, but placing '/sbin/reboot' does successfully reboot the systemThis is untrue for a User crontab, neither 'reboot' nor '/sbin/reboot' functions.So this is a temporary fix that can get your system working for now, but I'm going to keep digging.EDIT:
There's something more going on here, it doesn't seem to just be a su related problem. I passed my password plaintext to 'sudo systemctl reboot' and it didn't fire.
|
I am using ubuntu 18.04.I want to reboot my server every day.Here is my crontab file for root, which is I can see with 'sudo crontab -e' operation0 0 * * * rm /var/log/*log.*
0 0 * * * rm /var/log/rinetd.log
1 0 * * * reboot nowI confirmed that the rest of the commands work well, but only the 'reboot' command doesn't work and I do not know the reason.
I checked that 'reboot now' operation works well in the bash shell.obiwan@myserver ~ sudo reboot now
Connection to 10.10.10.122 closed by remote host.
Connection to 10.10.10.122 closed.When I searched for it, I only found questions about the '@reboot' option in the crontab do not work, so I'm writing this question.Always, thank you a lot.
|
Why 'reboot' operation does not work with crontab?
|
Replace> /var/log/cron/snapshotswith> /var/log/cron/snapshots 2>&1to get stderr, too.
|
I have a cron job like this*/5 * * * * /vault/configure_snapshots.sh > /var/log/cron/snapshotsI created a script and uploaded it during initialization (e.g. AWS EC2 user-data).
Afterwards I realized that I had to do some changes for testing. I added `set -x:set -x
server_ip=$(curl http://169.254.169.254/latest/meta-data/local-ipv4)
source /etc/environment
export VAULT_TOKEN=$(aws secretsmanager get-secret-value --secret-id $VAULT_ROOT_TOKEN_AWS_SECRET_ID | jq -r '.SecretString' | jq -r '.root_token')
# Check if the server is the leader in the cluster
/usr/local/bin/vault operator raft list-peers -format=json > /vault/peers.json
leader_ip=$(jq -r '.data.config.servers[] | select(.leader == true).address' /vault/peers.json | cut -d ':' -f 1)
if [[ $server_ip == $leader_ip ]]; then
echo "Taking snapshot..."
# ... trimmed
else
echo "Not the leader. Skipping snapshot."
fiThe result is:root@ip-100-73-25-168:/var/snap/amazon-ssm-agent/4046# cat /var/log/cron/snapshots
Not the leader. Skipping snapshot.Why is not everything being printed althouth I set -x?
|
CRON job not capturing changes in script
|
Make it 2 lines:0 0,8,16 * * 0-5At minute 0 past hour 0, 8, and 16 on every day-of-week from Sunday through Friday.And0 8,16 * * 6At minute 0 past hour 8 and 16 on Saturday.You can change the day and hour which you want to skip, but there is no way to do this in 1 line as far as I know.
|
I have a CRON expression that will run a given command every 8 hours, beginning at 00:00.0 0,8,16 * * *This will run a given commend 21 times a week, however, my goal is to skip one of these 21 runson a weekly basis. What is the proper CRON expression toskipthe first run on Sunday each week at 00:00 (in other words, an expression that will run 20 times per week)?
|
Crontab skip run once a week
|
Each alert/scheduled search is allowed a single cron schedule. If you need multiple schedules then the alert must be cloned.
|
I have one Splunk alert which should run infrequent at night and more frequent at day.00:00 - 06:00 every 30 minutes
*/30 0-6 * * *
At every 30th minute past every hour from 0 through 6.08:00 - 22:00 every 10 minutes
*/10 8-22 * * *
At every 10th minute past every hour from 8 through 22.Can I mix them using one cron expression?Or do I have to clone the alert and as a trade-off everything is redudant (except the cron expression) then?
|
Splunk: schedule an alert with two different frequencies (without overlapping)
|
Here'sman rg:ripgrep will automatically detect if stdin exists and search stdin for a regex pattern, e.g.ls | rg foo. In some environments, stdin may exist when it shouldn’t. To turn off stdin detection explicitly specify the directory to search, e.g.rg foo ./.Vixie Cron is one such environment, because for whichever reasonit sets stdin to a closed pipeinstead of a more typical redirection from/dev/null:/* create some pipes to talk to our future child
*/
pipe(stdin_pipe); /* child's stdin */So you should be able to reproduce it in your shell withtrue | python .../a.py, and fix it by adding a path as suggested in the manual (rg "hello" ./)
|
I am running a cronjob which calls a python script which has subprocess checkoutput.I tried a simple script to debug.import subprocess
import os
command = "/home/sgadamse/history_checker/code/rg \"hello\""
try:
result = subprocess.check_output(command,shell=True)
print(result)
except subprocess.CalledProcessError as e:
print(e)Output when ran in the shell:
I get the output i needed[~/history_checker/code]$ python a.py
a.py:command = "/home/sgadamse/history_checker/code/rg \"hello\""I created a cron job to run in crontab -e* * * * * python /home/sgadamse/history_checker/code/a.pyI get this error when its executed:Command '/home/sgadamse/history_checker/code/rg "hello"' returned non-zero exit status 1/home/sgadamse/history_checker/code/rg is the complete rg binary path that i downloaded and using it.Do we need to do anything differently for the the cron jobs to execute the subprocess checkoutput?Thanks.Edit:
I tried to debug the rg, Its actually running the command but the files its searching is only "stdin" and nothing else
any idea why this would happen?
|
sub process check output fails in cron job
|
if you want to change the installer, then you need to investigate custom pages in NSH language to inbuild this functionality into electron-builder installer
this will be complicatedIn my work I faced similar need and set a recurring task via windows scheduler tasks just by running a process command, please have a look at my code here:https://github.com/beliaev-maksim/beta_build_downloader/blob/6b5fce4b675cc108e4048e7d65676133df0ef78e/electron_ui/js/tasks_handler.js#L61same could be achieved using cron on Linux systems (but have to be installed on some distributions)Do not forget to vote for the answer and mark as accepted if that helped you
|
In writing an Electron app, I've found the need to execute a background task that will run even when the UI has exited. An installer will be distributed to different computers, so I need a way to schedule a recurring task either in the installer or in code that gets run as part of the Electron app process. I've looked into libraries like bree and agenda, but I haven't been able to find a way to schedule in the aforementioned manner with these libraries.How would I a) extend the functionality of the installer to schedule the task with native tools like Windows Task Scheduler or b) schedule this sort of recurrent task from my Electron app?
|
How to schedule a task in Node.js that runs after script has exited?
|
Enable your virtual environment as following:. /path/to/virtualenv/python/bin/activateThen with your virtual environment enabled type the following command:which python
# /home/myuser/.virtual-envs/yourvirtuaenv/bin/python
# example of output of which pythonThat will give you back the path that you can use in your crontab.Then you can use something like the following:0 2 * * * /home/myuser/.virtual-envs/yourvirtuaenv/bin/python /home/user/folder1/folder11/script2.pyHappy coding.
|
I have prepared a py Script to update my Django database and upload a file to gdrive once a day. Trying to use Crontab along with python to run the py script.ModuleNotFoundError: No module named 'googleapiclient'I have already installed googleapiclient module.
There is no error while running the same script in venv (virtual environment).0 2 * * * /usr/bin/python3 /home/user/folder1/folder11/script2.pyHow to access the already installed module inside crontab..?
|
Crontab ModuleNotFoundError
|
Yes, it is like you said,schedule: 1 of jan 00:10will work for you. It will be repeated on 1st of Jan every year at 12:10 am.Similarly, to run weekly:schedule: every monday 00:00Monthly:schedule: 1 of month 09:00For more such examples and verification you can refer to “Custom interval” section in thisdocumentation
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I'm trying to customise a cronjob to schedule run a function in Google Cloud.
I've been reading thedocumentationand as per title, one thing confuses me.The documentation mentions thateveryprefix must be used if the function is to be repeated at aDAILYinterval. But it is not clear on how it works if you want a function to be repeated at aWEEKLY,MONTHLY, or in my specific case,YEARLYintervals.I've addedschedule: 1 of jan 00:10to my cron.yaml, am I correct to assume that this will be repeated every 1st of January, 10 minutes after midnight or will it only run once? Do I need to change it toschedule: every 1 of jan 00:10?For the record, I found asimilar question hereon SO, but the problem is said question was asked and answered10 years ago, so I dont know how applicable it still is.
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Google Cloud cron.yaml Intervals
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The user nameprecedesthe command to run in the system crontab. Use0 * * * * root /bin/bash /home/henry/yupdate.sh > /dev/null 2>&1instead.
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Why does my bash script work in a terminal, but not when using crontab?I run Pop OS (Debian/Ubuntu)My crontab line:0 * * * * /bin/bash root /home/henry/yupdate.sh > /dev/null 2>&1Here is my script yupdates.sh:#!/bin/bash
PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
sudo apt update
sudo apt upgrade -y
flatpak update -yThe script runs fine in a terminal.The crontab is running in my /var/log/syslogJul 30 17:00:01 pop-os CRON[17989]: (root) CMD (/bin/bash root
/home/henry/yupdate.sh > /dev/null 2>&1)What I am doing wrong?
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Why does my bash script work in a terminal, but not when using crontab?
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use this:*/1 * * * * sh /location_to_cron/cron.sh >> /location_to_cron/backup.log 2>&1it can sendstdoutandstderrtobackup.log.
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Everyminute ( for Testing ) I am running a cronjob to create a container, Run a nodejs process in it and then remove the container as well.It works as expected from a regular command, but fails to produce any results or output when running via crontab.here is my crontab*/1 * * * * sh /location_to_cron/cron.sh >> /location_to_cron/backup.logHere is the content of the cron shell scriptCONTAINER_NAME="node_backup_repo"
echo "Creating Container to create backup, name: $CONTAINER_NAME"
docker run --name $CONTAINER_NAME -v /location_to_backup_dir:/app --dns="my_custom_dns" -w /app node:16 "backupscript.js" >> /location_to_cron/backup.log
echo "Removing container $CONTAINER_NAME"
docker rm $CONTAINER_NAME
echo "All done..."Syslog entries indicate that the crontab is being executed as my user, which is as expected. What could be wrong here?Edit:
Modified Working Script -Fix was to add path to docker binary.CONTAINER_NAME="node_backup_repo"
echo "Creating Container to do Backup, name: $CONTAINER_NAME"
/snap/bin/docker run --name $CONTAINER_NAME -v /location_to_backup_dir:/app --dns="my_custom_dns" -w /app node:16 "backupscript.js" >> /location_to_cron/backup.log
echo "Removing container $CONTAINER_NAME"
/snap/bin/docker rm $CONTAINER_NAME
echo "All done..."
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Running a "docker run" command via crontab does not work
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Typically you want to address this with a cron job.I would probably do the following:When the python file runs, save a log file with the status date/time.Set up a cron job on the server to check, say once every 24 hours, that checks that log file and either do nothing or runs the python file again.
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Closed. This question needsdetails or clarity. It is not currently accepting answers.Want to improve this question?Add details and clarify the problem byediting this post.Closed2 years ago.Improve this questionAssuming a script fails and it is captured in a try catch how to run a python script again after a few days?I can usesleepon this problem, but I think it will not work due to the fact that the server restarts every day. What is the best solution on this problem?
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Re-run a python script after a few days if it fails [closed]
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I guess you created the /etc/rc.local yourself right? AFAIK there isn't any in Ubuntu 18.04 anymore (as it is depricated). That's probably why it's not executed.@reboot in crontab might be a possible solution for your problem.
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I used crontab to run a bash script once a day (at midnight). This worked successfully, but I didn't really think it through enough to realise that the script would not run if my computer happened to be off at midnight (or even asleep).So I think that I have to keep the crontab entry (in case my computer is on) but I also want to make the bash script execute on startup (in case my computer was off) so that I have covered all my bases.I saw online that to have my script execute on startup I should edit my/etc/rc.localfile. My file now contains:#! /bin/bash
bash /home/me/code.sh
exit 0and my permissions are-rwxr-xr-x.However, the script does not execute on startup. Is there something I'm doing wrong?
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Bash script not executing on startup
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I have two possible versions of what could possibly be the case.One version is that there is malware that changes the cron to run a malicious process. It is very suspicious that a binary file is located in your /etc/apparmor.d/ directory as this directory is used to store the configuration files of apparmor, which are not in binary format. Note that in this case, the rkhunter could be unable to identify the malware due to it not having obvious malware characteristics(such as exact malware hash or suspicious string) that the rkhunter is looking for. In order to verify if this is the case, you need to reverse engineer the binaries and understand what they are doing or ask someone else to do it.Second version is that the VPS has a spurious configuration that results in changes to your cron configuration. To check if this is the case, you can monitor the processes running during the time that cron has been changed and identify the source of the problem. Also, you can take a look at the application logs and find which app is responsible for the overwrite.In case you want a more detailed answer please share more detailed information regarding your problem such as the contents of the binary files, monitoring results, app logs, etc.
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I have a new VPS with ubuntu 20.4 and I set up the crontab to run a .sh to make some database backup.But after a few days the backup didn't run. So I went to the server to check and the crontab was changed. So I set up again my script and if I run acrontab -lI can see my configuration. But after a few minutes the configuration changes to something like this:* * * * * /etc/default/tjoy9mwlxor* * * * * /etc/apparmor.d/if3iil.And if I run for example acat /etc/apparmor.d/if3iilto look at the file, it looks like a binary file.I don't know what is happening, also I did run a virus/malware scan with rkhunter and it looks like everything is ok.
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crontab is overwritten all the time
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Alternative solutions.0 0 9,11,13,15,17 * * *Because the requirements are not complicated, you can list the time to be executed one by one.Each field has a range, so your second one is not feasible.
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I am looking for the following schedule using CRON ExpressionsRuns every hour from 9 AM to 5 PM => "schedule": "0 0 9-17 * * *" => workingRunsevery 2 hoursfrom 9 AM to 5 PM => "schedule": "0 0/120 9-17 * * *" => not workingThe format per hour is (0-23) hence it is not recognizing.How I can achieve the following then? Runsevery 2 hoursfrom 9 AM to 5 PMhttps://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer?tabs=csharp#ncrontab-expressionshttps://github.com/atifaziz/NCrontab
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NCRONTAB Expression in Azure WebJobs
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Traditionally, stdout and stderr from cron jobs have been emailed to their owner, though on present-day systems where email accounts are dissociated from unix accounts, this has become a bit fuzzy. Your best bet is probably to explicitly redirect output to a file.(It's possible that there is some AWS specific answer to this, in which case, this being the Internet, someone is sure to tell us. :-) )
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I'm trying to automate a python script using crontab and reads many tutorials but unable to get in. I'm on AWS linux instance and wants to run my py file in every 45 minutes. My crontab have following lines*/45 * * * * /usr/bin/python3 /home/ec2-user/Project-GTF/main.pyand also listing of jobs bycrontab -lshows above lineLet's assume mymain.pyfiles contains a single print statementprint("Hello World")And I also use tmux to alive my terminal all the time.I suppose that my terminal prints Hello World in every 45 mins but not :( can anyone suggest what's wrong I doing. I don't know much more about cron and never automate a single cron job in my life span :[
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How to use cron with tmux session?
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in order to use special characters, you need to put your script in a bash files.Cron jobs with special symbols in the syntax will require you to make a bash (.sh) file which would support any form of cron job needed.A cron job that would execute a bash file looks like this:*/5 * * * * /bin/sh /path/to/shell/script.shAnd the bash.sh files contents should look like this:#!/bin/sh
/usr/bin/php /home/u123456789/public_html/script/scheduled.php cron:run > /dev/null 2>&1The first part#!/bin/shindicates this is a Bash file that will be opened by the cron.The second part loads the php libraries:/usr/bin/phpThe third part is the cron job that otherwise did not work because of the special characters. cron:run executes the cron job inside the file every time the file is openedSo after you have created your bash file, you can set up your cron in hPanel with the path of your bash file in file manager.
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So basically I recently went from cpanel hosting to hostinger. Now I had a cron job that ran easily on cpanel.* * * * * wget --spider -O - https://social.yoursite.in/api_provider/cron/order >/dev/null 2>&1, setting this cron was easy just paste and it ran. But now on hpanel I am unable to use the same command to setup cron jobs. It throws an error "Some characters are not allowed for cron job command". On contacting hostinger support, they say I can add these command lines to a Bash script or php script and add the script to cron.
I do not know anything on running scripts but searching a lot on internet and a little help from support team I made a file cron.sh and included these inside the file#!/bin/sh/usr/bin/php/home/u375788432/youbloom.in/public_html/social/ wget --spider -O - https://social.yoursite.in/api_provider/cron/order cron:run >/dev/null 2>&1still on checking this doesn't actually execute and the functionality I wish to achieve doesn't work.also if we can put this into a php script that would work too.
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Running a cron job on hPanel on Hostinger
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I know it's not easy to deal with SiteGround SuperCacher that can be annoying since you can't exclude it by specific path.
Anyway you still have a couple of chances:1) Add a fake param with a timestamp to your query string:curl --request GET https://www.youtdomain.com/yourpath?v=`(date +"%s")`Test response headers adding-Iand look for "x-proxy-cache: MISS" before put it in your crontab2) Configure your script to return nocache headerIf you have access to the remote script on SiteGround, add this response header to tell SG proxy not to cache that resource:<?php
header( 'Cache-Control: max-age=0,no-store');
?>
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I have multiple cron jobs that are access via CURL files.Curl -> Cron JobThe cron job works but will only work once. If I test it a second time immediately, nothing happens. I will clear the cache from my hosting (the dynamic cache on Site Ground) and then it will work again, but only once.On my local host, no problems. Why is it doing this while on the hosting site?Edit: Siteground has built in caching heaaers that I can put at the top of the page:header("Cache-Control: no-cache");
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Solved! Cron job will only work after clearing the cache
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*/15 0-7,10-23 * * *this schedule should do what you want.The event will fire on 0th, 15th, 30th and 45th minute of hours 0-7 and 10-23, each DOM, each month, each DOW.per[1]Configuring cron job schedules[2]crontab(5) — Linux manual page[3]crontab.guru
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I have set up a Cloud Scheduler which invokes a cloud function every 15 minutes. How would I be able to disable the Cloud Scheduler from 8 am to 10 am for example?
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Enabling Google Cloud Scheduler only during specific times (GCP)
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Cron does not know anything about your shell. Before you fire off your python script, you need to source inn all relevant environment information in order for the libraries to locate the different pieces. (Note the dot! in front of $HOME)0 5 * * * . $HOME/.bash_profile; /path/to/my/awesome/python_script.pyMake sureexport LD_LIBRARY_PATH=/path/to/my/oracle/<version>/client64is exported accordingly.Best of luck!
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When I'm running a python script from crontab it is throwing me the below error:Cannot locate a 64-bit Oracle Client library: "libclntsh.so: cannot open shared object file: No such file or directoryBut when I'm running the script manually its working fine. Issue is only when the job is running from crontab at the scheduled.
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Crontab error: Cannot locate a 64-bit Oracle Client library: "libclntsh.so: cannot open shared object file: No such file or directory
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You can list arbitrary values on cronjob expressions, by separating them with commas.For you case, what you want is:9,29,39,49,59 * * * *
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I want to set cron job run at 09 19 29 39 49 59 minutes in every hour, for example in 00:09, 00:19, 00:29, 00:39, 00:49, 00:59 and so on
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How to set cron job run at 09 19 29 39 49 59 minutes in every hour
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Get path to php.ini in you script:php_ini_loaded_file();set path to php.ini:/opt/php/7.3/bin/php -c /var/www/u1234567/php-bin/php.ini -f /var/www/u1234567/public_html/site.com/script.php
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I'm using PHP with a CRON job to get the contents of a URL using:$content = file_get_contents("http://www.example.com");I then use this content to send as an HTML newsletter. I'm running PHP 7, and I have enabled the relevant PHP INI settings:allow_url_fopen = OnHowever, the $content variable is still turning up empty and my error_log is showing the following error:PHP Warning: file_get_contents(http://www.example.com):
failed to open stream: no suitable wrapper could be found
in /home/xxxx/public_html/cron.php on line xxxEverything else in the cron.php is working as expected.Additionally if I manually visit the cron.php via a browser, file_get_contents is working perfectly.Running WHM/cPanel etc.Any help is greatly appreciated.
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PHP file_get_contents not working from CRON
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This will not usually work well since logrotate can't see the other nginx processes to sighup them. If nginx in particular can detect a rotation without a hup or other external poke then maybe, but most software cannot.In general container logs should go to stdout or stderr and be handled by your container layer, which generally handles rotation itself or will include logrotate at the system level.
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Using Kubernetes deploying nginx in several pods. Each pod is mounting access.log file to hostPath in order to read by Filebeat to collect to other output.If do log rotation in the same cron time in every pod, they are using common access.log file, it works.I tested with few data in a simple cluster. If large data occurred in production, is it a good plan or something wrong will happen with logrotate's design?
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Is it good or if there is some trouble will happen do a logrotate inside k8s pods with common file?
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looks like there are indeed benefits according to the AWS Docs:https://aws.amazon.com/blogs/compute/scheduling-ssh-jobs-using-aws-lambda/Decouple job schedule and AMI: If your cron jobs are part of an AMI, each schedule change requires you to create a new AMI version, and update existing instances running with that AMI. This is both cumbersome and time-consuming. Using scheduled Lambda functions, you can keep the job schedule outside of your AMI and change the schedule on the fly.Flexible targeting of EC2 instances: By abstracting the job schedule from AMI and EC2 instances, you can flexibly target a subset of your EC2 instance fleet based on tags or other conditions. In this example, we are targeting EC2 instances with the “Environment=Dev” tag.Intelligent scheduling: With scheduled Lambda functions, you can add custom logic to you abstracted job scheduler.
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We have an EC2 server that runs cronjobs. Currently there is a crontab on that server that holds the cronjob settings. Everything runs perfectly fine on this server.Would it be overkill to use AWS Cloudwatch Events to trigger the crons instead? ie create a cloudwatch event that calls a lambda to run a shell command on the EC2 instance.My thinking is that these would be possible benefits:no need to manage a crontab file on the EC2 servereasier to activate/deactivate specific cronjobs
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using CloudWatch Events to trigger cron jobs on an EC2 instance overkill?
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to avoid this kind of thing, what I usually do is check the date on the task. For example, I have a task that has to run every last day of the month. I can't use30or31on the day because Feb. has 28 days, for example.This is how I set-up the task# Apply interest accrued for all loans
# every day at: '22:00'
trigger_interest_accrued_application:
cron: "0 22 * * *"
class: "Jobs::TriggerInterestAccruedApplication"
queue: adminand on the task definitionclass TriggerInterestAccruedApplication < ::ApplicationJob
queue_as :admin
def perform
return unless Date.current.end_of_month.today?
perform_task
end
enddo you think something like this would work for you? IMO it is better because now what you want to do is put some logic on the scheduler file and this could probably bite you later
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how I can pass dynamic value in regular expressionnew_date_value = query_value
# minute(0-59), hours(0-23), day of month(1-31), month of year(1-12), day of week(0-6) 0=sunday
every '0 4 #{new_date_value} * *' do
rake "db:get_free_tag_latest_post_batch", :environment => "production"
end
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How to pass dynamic value in schedule.rb file ( Ruby on rails )
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*in crontab means "every" - so this expression means "on every minute of every hour of every other day". Instead, you should specify some minute and hour combination. E.g., to run this cron job at 2AM every other day, you could use:0 2 */2 * * pip install boto3 && pip install python-dateutil && pip install pytz && /usr/bin/python2 /home/ubuntu/AMI_Cleanup.py >> /home/ubuntu/AMI_Cleanup.log 2>&1
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Closed.This question does not meetStack Overflow guidelines. It is not currently accepting answers.This question does not appear to be abouta specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic onanother Stack Exchange site, you can leave a comment to explain where the question may be able to be answered.Closed3 years ago.Improve this questionI have the following cron:* * */2 * * pip install boto3 && pip install python-dateutil && pip install pytz && /usr/bin/python2 /home/ubuntu/AMI_Cleanup.py >> /home/ubuntu/AMI_Cleanup.log 2>&1And, it is running every 30 seconds or so...I cannot figure out why and have tried everything. I ran aps axjfand it is indeed the cron running (not something I was unaware about). Is my schedule wrong? I expect it to run every two days...
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Cron running too frequently [closed]
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You can use like this$schedule->job(new EveryMinuteJob)->everyMinute()->user($user);
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Our system has some scheduled jobs, one of the jobs should run as a user to get authorized. What is the best way to do it?App\Console\Kernelschedule has these,.....
$schedule->job(new EveryMinuteJob)->everyMinute();
$schedule->job(new EveryFiveMinuteJob)->everyFiveMinutes();
....the EveryMinuteJob is being handled in multiple places which are authorized only for admin role users. So in the EveryMinuteJob, using Auth::login() and ::logout() to run the job as admin as below. Is this the only way or any other best practice to do?class EveryMinuteJob implements ShouldQueue {
public function handle()
{
..........
Auth::login(User::where('super_admin',true)->first());
..........
Auth::logout();
..........
}
}
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Laravel: How to run a cron job as specific user?
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Try:cron(0 0 1 */3 * *)cron(0 0 1 1 * *)
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I'm trying to create CRON expressions in YAML:1. AWS Cron expression to run at 6AM every month: This what I have: cron(0 6 1 * ? *)
2. Run every 3 months
3. Run once a year in JanuaryCan someone please help with this. Appreciate it greatly
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AWS cron expression to run every month, every 3 months and once a year
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The jdbc inputsetsmax_work_threads for theRufus schedulerto one. If there is no available worker thread thentrigger_queuedoes nothing, so that instance of the job will never be run. It will wait until the next time the queue should be triggered.
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UsingLogstashto import data fromMysqltoElasticsearch, the sql track theupdate_timestampof a table, and scheduled every1 minutes.There are some special cases when the sql can't finish in 1 minute(e.g initial import into a new ES instance).BTW, it seems that logstash will do import in small batches of 100k rows if the sql matches over 100k rows.The question is:If the sql can't finish in 1 minutes(aka. before next scheduled time starts), what will logstash do?Will it:Skip the next scheduled task?This seems to be the case, in my observation, but not sure.Delay the next scheduled task, but never skip one?Or, something else.
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What happens when a scheduled task didn't finish before next scheduled time starts?
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The crontab you've listed means;* 9 * * *
> At every minute past hour 9You'l need0 9 * * *since you only want to job to run on the whole our, hence the0minutes.0 9 * * *
> At 09:00Use something likecrontab.guruto visualize it.
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I just wanna run a .sh file everyday 9AM PST. I just created scheduler in crontab in linux as like below* 9 * * * /home/arrchannaMohan/PaymentsAlert.shPaymentsAlert.shcurl -k http://localhost:8080/emailTriggerThe above curl command will trigger email with some business content every day 9 AM PST and It should run one time per day. So every day 9AM PST this shell script should be invoked one time.But the above cron configuration will start initiating the email alert every 1 minutes interval after 9AM PST and its keep continuing until we kill it manual.Is it possible to create a cron config that will run once a day(Expecting to run 9AM PST).
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How to run the shell script in cron job in specific time at only once per day
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This one worked for me:* 0,8,16 * * * cd ~/nodejs_projects/amazon_search_v2/ && /usr/bin/node searchItemsApi.js >/dev/null 2>&1As described here:LinkIn Curtis Xiao answer.
Usingwhich nodeto find the node executable path andcdto get into the file folder and prevent relative path issues.
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I'm trying to automate a Node.js file to run on schedule.
But I can't get it to work.I'm usingrootuser.This is the path to get to the file location from login:nodejs_projects/amazon_search_v2Here is pwd output from the login location:root@project:~# pwd
/rootAnd this is the script i'm adding incrontab:0 4,12,20 * * * node nodejs_projects/amazon_search_v2/searchItemsApi.js >/dev/null 2>&1What am i'm missing here?
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How to set cron job correct path to run a node.js script?
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These are permission and path errors, easily resolved.Look in system preferences to grant full disk access to your binaries and unset PATH in your scripts to catch any paths that are not complete.I recommend/usr/local/binfor ease of maintaining any scripts you wish to havelaunchdorcronto schedule.There’s no reason you can’t run from your user folder if that suits you, however.
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I'm attempting to cron a simple bash script on my macbook-pro laptop. Ultimately, I would like to first get this to work for bash script and then move on to my python scripts. I've created a simple bash file (named hello.sh) with the code below:#!/bin/bash
echo "Hello World" >> /Users/myusername/Desktop/test.txtAnd mycrontab -eis designated as follows:* * * * * /bin/bash /Users/myusername/Desktop/bash-files/hello.shHowever, I get nothing after waiting a minute.After googling around, I concluded that maybe I was running into the "gotcha" issue (cron reading different parameters thanenv). So I queued the following:* * * * * env > /tmp/env.outputand it's output as followsSHELL=/bin/sh
USER=myusername
PATH=/usr/bin:/bin
PWD=/Users/myusername
SHLVL=1
HOME=/Users/myusername
LOGNAME=myusername
_=/usr/bin/envrunningenvin my terminal produces the following relevant parameters:SHELL=/bin/zsh
USER=myusername
PATH=/Users/myusername/opt/anaconda3/bin:/Users/myusername/opt/anaconda3/condabin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin
PWD=/tmp
SHLVL=1
HOME=/Users/myusername
LOGNAME=myusername
_=/usr/bin/envI've added the above parameter settings to my hello.sh script but I still get nothing.Can anyone point out to what my issue is here?
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Simple bash script doesn't cron properly
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You can check the expression config from the below image.If you write like this"* * *"it will run for every minute.
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cron.schedule('* * * 1 *', function () {//do something })this is my code for cron job, it supposed to trigger the first day of every month. but it won't be doing anything what I am doing wrong here.
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node js crone job is not working first day of every month
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First, if you want a crontab to run every minute, you should use* * * * * <your command>and not1 * * * * <your command>which will run the cron job every hh:01 (the first minute of every hour).Next, the wordrootin your crontab seems a bit odd to me. Should you want to run a cron job as root, you'll normally have to create it under that user. You could trysudo crontab -eorsudo crontab -u <a user> -eto create it as "a user".Finally, if you want a crontab to run every 6 hours, you can use0 */6 * * * <you command>.
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How you doing?I've been trying desperately these days to achieve to run a script each 6 hours without any success, I even tried the simpliest scripts and they don't trigger at any moment, I dont know what Im doing wrong.First I tried to add a new crontab usingcrontab -e, adding the following line:1 * * * * root echo "test" > /home/ubuntu/test.txtThis cron job should be executed each minute and override the contect with the string "test", but neither it does create the file or adds the string (obviously)I've also tried modifying the /etc/crontab file, without any success, there I've added the following line:* * * * * root date && echo 'it works' >> /home/ubuntu/crontest.log 2>&1With the same result, never it gets executed, the service is running, I made apt updates and everything and nothing seems to work, why?
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Cron jobs are not working on EC2 Aws Ubuntu 18.04 instance?
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there are a number of diffrent methods you can use though, I suppose it would depend on the use case.
assuming its a one-off script file use cronjobsgreat resource for editing cronjobshttps://crontab.guru/#0_8_1-31_*_*
and scheduling bash script tutorial:https://www.golinuxcloud.com/create-schedule-cron-job-shell-script-linux/one off or bashscript: try using cronjobs to schedule script executions.Ubuntu Program or project you created: Supervised - like a program controller you can use it to manage specific programs.IT Automation multi-clusters: Ansible is pretty popular though there are others
great if you have multiple clusters or instance of your VM connected using ssh.
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I am using the Google Cloud Platform to run a virtual Ubuntu Machine, and I would like to schedule a .sh script to run at 08:00 every day. I am currently using the free credit on the Google Cloud Platform, and would ideally keep it this way.How could I schedule the VM to start-up, and the script to run every day?
|
Running a script at scheduled times from Google Cloud VM (Ubuntu)
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Take a look at Meteor Jobs package:https://github.com/vsivsi/meteor-job-collectionBasically you could schedule a regular job that scans your data to reset your customers.
|
So I have a Meteor app, which allows users to do a particular task a certain number of times per month, depending on their subscription plan.Their limit, current count and reset date are all stored in a MongoDB collection, but my question is how to reset the count on the specific date?Would a simple cron-job do the trick?TIA
|
How to reset user monthly usage in Meteor?
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You need to make sure that you declare the service that you want to use from the global module in theCron-Service's providers. Consider this simple example:// Sample Cron-Service
// -------------
@Injectable()
export class CronService {
private readonly logger = new Logger(CronService.name);
constructor(private globalService: GlobalService) {
}
@Cron(CronExpression.EVERY_5_SECONDS)
test() {
this.logger.debug(`Called every 5 seconds with random value: ${this.globalService.getSomeData()}`);
}
}
// Cron-Module
// -------------
@Module({
providers: [CronService, GlobalService] // <--- this is important, you need to add GlobalService as a provider here
})
export class CronModule {
}
// Global-Service
// -------------
@Injectable()
export class GlobalService {
getSomeData() {
return Math.random() * 500;
}
}
// Global-Module
// -------------
@Global()
@Module({
providers: [GlobalService]
})
export class GlobalModule {
}Also, you need to make sure that the global module is imported in your root/core module - along with theScheduleModulefrom the@nestjs/schedulepackage, e.g.:@Module({
imports: [GlobalModule, ScheduleModule.forRoot(), ... ]
})
export class AppModule {
}
|
I set up a cronjob that is supposed to fire and call a service from another module. console logged items are displaying in the console and When I run the method manually from the endpoint. The service returns a successful result. But once I put back the cronjob decorator. The service is undefinedthrowing exceptionTypeError: Cannot read property 'getAll' of undefinedI have used other nodejs cronjob packages, but the error persists. Is there a workaround?@Cron(CronExpression.EVERY_10_SECONDS)
async test() {
try {
console.log('working 22');
const ee = await this.Service.getAll();
console.log(ee);
for (const key in ee) {
console.log(ee[key].termsID);
}
const terms = await this.termsModel.find({
isDeleted: false
});
console.log(terms);
console.log('working 22 end!');
} catch (error) {
console.log(error)
}
}appmodule@Module({
imports: [
TermsModule,
ScheduleModule.forRoot()
],
controllers: [],
providers: [],
})
export class AppModule { }
|
Nestjs cronjob cannot read inject service
|
I'm assuming you're trying to stay in the GCP ecosystem.For scalability you could use cron to kick off a Google Dataflow pipeline. With this pipeline you can define a pipeline step to be executed for each record that matches the given query. Dataflow will ramp up the number of workers as it goes to handle the scale.If you're not at that level of scale, Dataflow can be a bit heavy and may feel like overkill for your current use case. If that's the case, then you can use a combination of cron and google cloud tasks where you'd enqueue/launch a task per record. For large amounts of records, you could launch a task per batch of records (i.e. an injector pattern)https://cloud.google.com/tasks/docs/manage-cloud-task-scaling#large-scalebatch_task_enqueuesAnother option is just using google cloud tasks, using the'schedule_time'field. Here you'd enqueue the tasks when you originally write the record into the DB, instead of periodically querying to see which ones need to be runhttps://cloud.google.com/tasks/docs/creating-http-target-tasks2- Is there any difference between running Cron jobs in NodeJS, and running Cron Jobs in Google App Engine ( server-less instance), which one is better?I wasn't sure what you meant by your second question because you can run node.js in app engine. In my experience things do work better when you keep everything within GCP.
|
I know this might be a broad questions, but I've been trying to find the right way to do this and I don't seem to be going anywhere.Basically, I have a bunch of Objects saved in mongo that contain events, like below :{
"date" : "2020-09-09",
"day" : 1599573600000 // epoch time
"from" : 1599595200000 // epoch time
"to" : 1599695200000 // epoch time
}I need to fire some events, like sending a reminded SMS etc, before the date that is specified infromfield.I know I can write a cron job and regularly check on my entire mongo collection, find all the ones that are due and the rest is obvious.However, somehow I feel like there must be a better way, because this can be extremely slow after our database grows with millions of events.So the question that I have is,1- What are some other options, beside cron jobs.2- Is there any difference between running Cron jobs in NodeJS, and running Cron Jobs in Google App Engine ( server-less instance), which one is better?3- Is there any service out there that anyone has used?Any direction would be appreciated.
|
Run scheduled tasks on huge mongo items
|
AWS cron works a bit different. For your case try cron(0 0 * * ? *). You can read more herehttps://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.html
|
I want my schedule to run every night at 00:00.So in cloud formation I have set:ScheduleExpression: "cron(0 0 * * * *)"But it fails the deployment saying that ScheduleExpression is not correct. Any hints?
|
AWS ScheduleExpression is not valid
|
Well, the expression wasn't right.It considers minutes only and the*/5confused it too maybe. Not sure about the*at the end.0/5 7-23 ? * MON-FRI *- this worksTo debug triggers, there is "Rules" section in the log service, where you can see the next executions.
|
I have set the following cron expression in AWS (CloudWatch trigger).0 */5 7-12,1pm-11pm ? * MON,TUE,WED,THU,FRIIn expression generator, I get for very similar expresssion (7-23 intead of the hours )At second :00, every 5 minutes starting at minute :00, every hour between 07am and 23pm, on every Monday, Tuesday, Wednesday, Thursday and Friday, every monthas expected.However, it is not triggered. I don't see anything in the log.Why is that? (trigger is enabled of course)Thanks.
|
AWS cron expression OK, lambda not triggered
|
You might probably used account from "IAM & Admin" in "IAM" tab, but for some it might be working, for some other not. Hard to find, on my testing account I have more than 20 and only 5 where working.This is error is not showing up when you use account listed in is"Service Accounts"tab (which was just a few instead of many in "IAM&Admin/ IAM").I have tested it quickly. Trying to add any service account from IAM tab, that is not listed in Service Accounts was giving error.Than I have added new account like:scheduler@<my-test-project>.iam.gserviceaccount.com.Without any permissions I was able to use it in Cloud Scheduler without the error. I suggest to do it the same way.
|
I have a website with code that I want to make run periodically (sending e-mails).My web.xml is as follows:<servlet-mapping>
<servlet-name>sendEmailsController</servlet-name>
<url-pattern>/cron/sendEmails</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>sendEmailsController</servlet-name>
<servlet-class>sendEmailsController</servlet-class>
</servlet>I am trying to schedule the code to run through Google Cloud Scheduler, but when I'm editing the 'Service Account' field to insert my[email protected], I get a black pop-up saying: Updating job "myJob" failed: Unknown errorI've tried saving the job with the Service Account field left blank and it shows Success, but it doesn't run my code (does not send e-mails), neither prints the logs I left in the code.
Also, I've tried adding the Cloud Scheduler Admin, Cloud Scheduler Job Runner and Cloud Scheduler Service Agent roles to the service account in case it was a problem with the permissions, but it didn't work either.For Frequency, i'm using * * * * * (every minute), target is HTTP, HTTP Method is GET, and URL is https://myDomain/cron/sendEmails
|
Cloud Scheduler showing Uknown Error when adding Service Account
|
As far as I know all cronjobs in SAP Commerce start in a dedicated thread.
Thus you should be able to identify the thread your groovy script is running in by going to the hAC and executing a thread dump (Monitoring -> Thread Dump). In that thread dump find the thread and kill it with below groovy code from the Scripting Languages View.I've used this approach a couple times, but only in very rare occasions when really nothing else helped.Set<Thread> threads = Thread.getAllStackTraces().keySet()
threads.each {
if(it.name.startsWith("YOURCRONJOBNAME")){
it.interrupt()
print "KILLED\t"
} else{
print "\t"
}
println "${it.name}"
}You should always make sure to implement theAbortablecontract (by overridingisAbortable()) when implementing custom cronjobs, then you'll be able to stop them from within the backoffice.
|
I have created the groovy script to reprocess a failed process and save in backoffice.There is requirement where I have to manually abort groovy script. Thus anyone can suggest the way if we can abort Groovy script like Cronjob?
|
How to abort running Groovy script in Hybris?
|
See if this helps :cron = CronTab(user='username')
job1 = cron.new(command='python example1.py')
job1.hour.every(2)
job2 = cron.new(command='python example1.py')
job2.every(2).hours()
for item in cron:
print item
cron.write()
|
I am using python-crontab to build a Desktop notification system. However, I can not figure out how to schedule multiple scripts using python-crontab.Here is what I have to schedule one script:my_user_cron = CronTab(user=True)
job=my_user_cron.new(command='usr/bin/python3 /Users/Desktop/script.py', comment='script')
job.setall(* * * * *)
my_user_cron.write()If anyone knows how to schedule multiple scripts using this library, please let me know. If you need more information or have any questions, feel free to ask.
|
Multiple jobs using python-crontab
|
try this (*/30 08 * * Mon) and for any more queries visithttps://crontab.guru/#*/30_08_*_*_Mon
|
I am trying to run a cron job using node-cron every Monday at 8:30 so I use "30 8 * * Mon" which never runs (I also used "30 08 * * Mon" to be sure). After a bit of troubleshooting, I have seen that "30 * * * Mon" does work and runs on the 30th min of every hour. Can anyone help me figure this out, please?
|
Why is my hour parameter not working in node-cron
|
Cron expressions do not work with Request scoped providers, due to possibly being run outside of the context of the request. Due to this, all dependencies come in asundefined. To fix this, you'll need a non-request-scoped provider.
|
I tried using cron scheduler to get authentication token every 15 sec(Test purpose) the cron is supposed to call the auth endpoint but I gotException has occurred: TypeError: Cannot read property 'post' of undefined@Cron(CronExpression.EVERY_15_SECONDS)
async handleCron() {
//const Primetimeauth = this.PrimetimeAuth()
const primeAuth = await this.httpService.post('https://clients.com/api/auth', {
"username": process.env.username,
"password": process.env.password
}).toPromise();
if (primeAuth.status != 200) {
throw new HttpException({
message: `Vending Authentication Failed`,
statusCode: primeAuth.status
}, HttpStatus.BAD_REQUEST);
}
const data = primeAuth.data;
await this.PrimetimeAuthToken.updateOne({ "_id": "3dtgf1341662c133f0db71412drt" }, {
"$set":
{
token: data.token,
tokenExpirationTime: data.expires,
timeTokenReceived: new Date
}
});
return data;
}
|
How to fix TypeError: Cannot read property 'post' of undefined on Axios with Nestjs cronjob
|
I haven't seen a /bin/sh in a crontab like that.Why aren't you using a shebang at the start of your file like so:#!/usr/bin/env bashIs the file itself executable for the crontab user that is executing it?chmod +x /opt/XXX-1.0/jobs/jobs.sh
|
I tried to configure crontab to execute a shell script every day.
When executed manually, the file works well. Unfortunately, crontab won't execute it.Here's my shell file:#! bin/bash
# GENERAL properties
BASE_DIR=/opt/XXX-1.0
# JOB properties
JOBS_DIR=$BASE_DIR/jobs
#find all main etl jobs and execute them
cd $JOBS_DIR
find . -name '*mainrun.sh' -exec {} \;And here's my crontab10 14 * * * /bin/sh /opt/XXX-1.0/jobs/jobs.shAny ideas on what could be preventing me from executing it?Thank you.
|
Crontab won't execute shell script
|
Based on @M.Deinum comment... I used ApplicationListener but with ApplicationReadyEvent! So, my example becames:@EventListener(ApplicationReadyEvent.class)
@Scheduled(cron="0 0 5 * * *")
public void somethingToDoOnRebootTime() {
// code here, to run every day at 5a.m., AND at boot first time...
}
|
I made many searches over internet about an option mentioned by Baeldunghere, but I can't find any example. I would like to use something like this:@Scheduled(cron="@reboot")
@Scheduled(cron="0 0 5 * * *")
public void somethingToDoOnRebootTime() {
// code here, to run every day at 5a.m., AND at boot first time...
}But it didn't work, 'cause "@reboot" is not a valid cron expression... I tried to use this "@reboot" as a normal annotation to the method, but it didn't exists too...Someone can help me? Is the article on Baeldung wrong?
|
Can we make a @Scheduled execution on Spring, mixed with cron parameter, forcing a first execution at boot time?
|
Call the following command to find where theshutdownbinaray is :whereis shutdownOn my raspberry, i have the following output :whereis shutdown
shutdown: /sbin/shutdown /usr/share/man/man8/shutdown.8.gz /usr/share/man/man2/shutdown.2.gzThen, change the script call fromshutdownto the full path to the shutdown binary (for me :/sbin/shutdown).
|
I have the followingcrontabsetup for the root user (sudo crontab -e)@reboot cd /home/pi/ && python3 myscript.py 2>&1 >> log.txtThemyscript.pyexecutes the following command at a given time:import subprocess
subprocess.call('shutdown -h now', shell=True)The problem is that I get the following error when this command runs as a crontab at reboot:/bin/sh: 1: shutdown: not foundwhereas when I run the following line after logging in as root user:cd /home/pi/ && python3 myscript.py 2>&1 >> log.txtall goes fine and the system is shutdown without that error.Even though I didn't expect it, there seems to be a difference between the way the two commands are executed. Could it be that crontab @reboot somehow has a different context and therefore doesn't behaveexactlylike when a root user executes that command?
|
Differences between crontab root command and normal root command
|
Using&&you could create a one-liner cron command that would execute the commands in order (supposing all exit with no errors).
For example, if you would like to run consecutive commands on 3am each day, you could add to your crontab:0 3 * * * python3 /full/path/to/first/script/otomoto.py && node /full/path/to/second/script/csvtoxmls.js && node /full/path/main.jsFo extra cron configuration, you could check:https://crontab.guru/
|
I have a python script that generates a csv file the csv file then gets converted into an xmls file using a nodejs script and finally using an other nodejs script the xmls file gets imported to google spread sheet.i want to be able to run a cron job that does all this one time a day automatically.Here are the list of commands i have to use manually in order :1- Cd to this project director Otomoto_project_final/otomoto_final_project/otomoto
2- Run a python script called otomoto.py ( this will generate an output.csv file )
3- Cd back up .. to this path Otomoto_project_final/otomoto_final_project/
4- Run the following command : node csvtoxmls.js ( this will generate the otomoto.xlsx file)
5 - Run the following command : node main.js ( this will push the otomoto.xlsx file to the google spread sheet )
|
Running a cron job on ubuntu
|
The same as if you run it directly from your shell. There is no difference between running it from your shell or from the crontab.
|
The question says it all. If I have a cronjob that runs a python script, what will the value of__name__be?
|
What will __name__ be when python script run from crontab?
|
If you runtmuxin your regular terminal, it will search the$PATHvariable to find the correct folder.Scripts that get executed bycrondoes not share the same environment$PATHvariable as your user, therefore the script can't find the exatuable.You could add the$PATHto you script, like so:#!/bin/bash
PATH=/usr/local/bin
tmux kill-session -t collect
tmux new -s "collect" -d ./stuffBut I guess using the full path is in your case much more readable!Read more about$PATHonunix.stackexchange
|
I'm on MacOS Catalina. I'm trying to run a cron job that spawns a named tmux session with windows. Here is thecrontab -l:* * * * * cd /Users/dev/project; ./start.sh; ./poll 2>> /tmp/cron.outHowever I don't see my session withtmux ls. In my error logscat /tmp/cron.out./poll: line 3: tmux: command not found
./poll: line 5: tmux: command not foundThis is the script I'm running. I have tmux installed for my user, and it works normally. When I executepollnormally, it works just fine.Here isstart.sh:#!/bin/bash
tmux kill-session -t collect
tmux new -s "collect" -d ./stuff
|
How do I run a cron job that spawns a tmux session? (MacOS)
|
no, you can only have one file per userbut you can add multiple cronjobs in one crontab file.
One cronjob per line.
|
I'm working on setting up cronjobs using PHP script. I know how to set up single file as a crontab, for example - shell_exec('crontab testcron.txt');Is it possible to set multiple files as a crontab, like -shell_exec('crontab testcron1.txt testcron3.txt testcron2.txt');
shell_exec('crontab testcron1.txt,testcron2.txt,testcron3.txt');Thanks.
|
Set up multiple file using crontab using PHP script
|
Spring does not insert@Valueinto static fields though it can be done via a setter.And this is also applied tostatic finalfields which need to be defined at compile time.So you could not configureCRON_EXPRESSIONvia@Value, it could work only if you set it hardcoded:private static final String CRON_EXPRESSION = "0 0 8 * * ?";
@Scheduled(cron = CRON_EXPRESSION, zone="GMT")
public void scheduledObjectFetch() {...}
|
I've been trying to set the cron property of @Scheduled as below.public class ObjectScheduler {
@Value("${config.cron.expression}")
private static final CRON_EXPRESSION;
@Scheduled(cron = CRON_EXPRESSION, zone="GMT")
public void scheduledObjectFetch() {...}
}I'm getting a compile time error here sayingThe value for the annotation attribute Scheduled.cron attribute must be a constant expression.The same thing works if I give the expression in the attribute directly@Scheduled(cron = "${config.cron.expression}", zone="GMT")Here also the value is being assigned at runtime from the config so why doesn't it give a compile time error here? Why is it that when I assign it to a variable using the @Value annotation does it not consider it be a constant expression? Is there something I'm missing? Is it due to Java or Spring's @Value annotation?
|
Trying to set cron property of @Scheduled from property file using @Value but getting compile time error
|
Yes, you will simply have to do what Firebase scheduled functions does internally, and:ConfigureCloud Schedulerto send a pubsub message on your required scheduleImplement thepubsub triggerin the language you want
|
This pagedescribes how to schedule Google Cloud Functions to run periodically. However, the example code is in JavaScript, and it seems that the configuration - registering the code that is called periodically - actually happens from the JavaScript, and makes use of JavaScript-specific SDKs. Is there any way to make use of the Schedule functionality from other Google Cloud Functions languages (in my case, Go)?
|
Schedule Google Cloud Functions in Golang?
|
AWS Scheduler supports "L" to be used as the last day of the month. You can find it documented here -https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.htmlThe L wildcard in the Day-of-month or Day-of-week fields specifies the
last day of the month or week.
|
Hi If I open CloudWatch I have the option of Creating Schedule Snapshot. My challenge is scheduling a Snapshot once every last day of the month.
|
AWS auto snapshot Schedule for last day of the month
|
cronis still supported by OSX but it has beendeprecatedinlaunchd.You need to create a "plist" file and place it in folder ~/Library/LaunchAgents. Example plist file:<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>example</string>
<key>ProgramArguments</key>
<array>
<string>Rscript /path/to/example.R</string>
</array>
<key>StartCalendarInterval</key>
<dict>
<key>Minute</key>
<integer>0</integer>
<key>Hour</key>
<integer>23</integer>
</dict>
</dict>
</plist>You need to load thisplistfile into thelaunchdscheduler and start it:launchctl load ~/Library/LaunchAgents/example.plist
launchctl start exampleNameexamplecorresponds to the fieldLabelin theplistfile.
|
This is my crontabIt´s supposed that my script on R saves csv on my directory.write.csv(raw_data, paste0("/Users/marianafernandez/Desktop/prueba/data-raw/database_pulls/raw_data/raw_data_", Sys.Date(), ".csv"), na = "", row.names = F)If I run on my terminal: R Script scraping.R everything goes fine. But when I try to do my cronjob is not working, nothing happens. Help me please
|
Cant schedule R script with cron
|
I found the answer:
Exporting the platform variable to offscreen in the script that calls phantomjs did the job.export DISPLAY=:0
export QT_QPA_PLATFORM='offscreen'
phantomjs snapshot.js www.website.com website.png
|
I am trying to schedule a call to phantomjs using chron. The phantomjs will open a website and save a screenshot, and I do want to set this up routinely. My machine runs headless, no display connected.
I am using a bash script to call phantomjs, e.g.phantomjs snapshot.js website.com snap.pngThis code is running fine when excecuted on the shell manually.
Now, when I set up a chrontab for it, an error occurs.qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.I can solve this error by changing the code to:DISPLAY=localhost:11.0
phantomjs snapshot.js website.com snap.pngThis works fine as long as I am logged in over shell and the crontab is running. When I log out, it will give the same error as above.When I set the display toDISPLAY=:0, as I saw in some solutions for similar problems, it readsqt.qpa.screen: QXcbConnection: Could not connect to display :0 Could
not connect to any X display., both running locally and under crontab.I set the PATH and the XAUTHORITY='home/usr/.Xauthority' in my shell script.Many thanks for suggestions
|
phantomjs chrontab could not connect to x display
|
You can just addhour='9-17'to accomplish that.
|
I have a currentapschedulerthat runs the jobmon-friand an interval of~4 minsall day long. Is it possible to run the job for a specific time range? Lets say from9:00 am to 5:00 pmin this case?My expression looks like this:scheduler.add_job(feed_data, 'cron', day_of_week='mon-fri', minute='*/3', jitter=30)Is it possible to addstart/end datetimeto this expression?
|
Apscheduler run job every weekday on specific time range
|
I think you have the wrong library installed. You should dopip install python-crontab, notpip install crontab.Seehttps://pypi.org/project/python-crontab/
|
I'm using a python script to update crontab for a particular user 'pi' using code below and keep getting this error. Using this same exact script on a ubuntu works without any error.
Anyone got any ideas why this might be?CODE:***my_cron = CronTab(user='pi')
for job in my_cron:
if job.comment == i:
job.minute.on(crminutes)
job.hour.on(crhour)
my_cron.write()***ERROR:***Traceback (most recent call last):
File "crontimings.py", line 455, in <module>
my_cron = CronTab(user="pi")
TypeError: __init__() got an unexpected keyword argument 'user'***Script permission look like this:-rwxr-xr-x 1 pi pi 16686 Apr 24 19:34 crontimings.py
|
crontab/Python script error - __init__() got an unexpected keyword argument 'user'
|
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