nl_command
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Count total number of lines in all *.txt file in cuuent directory . | find . -type f -name '*.txt' -exec wc -l {} \; | awk '{total += $1} END{print total}' |
Create a symbolic link in the current directory for each file under the directories matching "../[12][0-9][0-9]" | find ../[12][0-9][0-9][0-9] -type f -exec ln -s {} \; |
Find all directories under current directory and change their permission to 700 | find . -type d -exec chmod 700 {} \; |
Copy the 3 specified files to /tmp/package, preserving/creating directory structure of each file as specified on command line. | cp --parents src/prog.js images/icon.jpg /tmp/package |
Print the contents of "file" in reverse order | nl file | sort -nr | cut -b8- |
Display differences between files "a.txt" and "b.txt" side-by-side and do not output common lines. | diff -a --suppress-common-lines -y a.txt b.txt |
displays all files in the current directory | find . |
display all the regular/normal files in the home folder that have been modified in the last 1 day (from the start of day ie, from 00:00 ) | find ~/ -daystart -type f -mtime 1 |
Print paths to all subdirectories inside of a directory | du | awk '{print $2}' |
search for the directory testdir in the folder /home | find /home -type d -name testdir |
Change permission to 755 for all directories under $d directory tree | find "$d/" -type d -print0 | xargs -0 chmod 755 |
prints absolute file path of a file | echo $(cd $ && pwd -P)/$ |
Find the sizes of only directories under current directory sorted by size and redirect the output to dir-sizes.txt | find . -type d -print0 | xargs -0 -n1 du -sk | sort -rn > dir-sizes.txt& |
Change owner to "root" and group to "wheel" of "bin" | sudo chown root:wheel bin |
Change permissions of all regular files from the current directory tree to 644 | find . -type f -exec chmod 644 {} + |
Find regular files which have 644 permission | find . -perm 644 -type f -exec ls -l {} \; |
Report available space on the file system containing /tmp in kilobytes. | df -k /tmp | tail -1 | awk '{print $4}' |
dispaly a long listing of all the files in the current folder which have been modified in the last 14 days | find . -mtime -14 -ls |
List all *.c, *.h and *.cpp files under current directory | find . -type f \ -exec ls {} \; |
copy all the mp3 files from current folder to another folder | find . -name '*.mp3' -exec cp -a {} /path/to/copy/stuff/to \; |
search for a word in all the files in the current directory and display the file paths relative to the current directory | find . -exec grep -l foo {} + |
Puts working directory into clipboard, stripping newlines | echo -n $ | pbcopy |
Force create a symbolic link named "mylink" with target "/apps/myapps/new/link/target" | ln -f -s /apps/myapps/new/link/target mylink |
Search all files in the current directory tree for "SearchString", ignoring .html files and skipping .svn directories | find . \( -name '*.svn*' -prune -o ! -name '*.html' \) | xargs -d '\n' grep -Hd skip 'SearchString' |
Remove all core dump files from user's home directory | find ~/ -name 'core*' -exec rm {} \; |
Display each line in file.txt backwards | rev file.txt |
Rename "/usr/bin/php" to "/usr/bin/~php" | sudo mv /usr/bin/php /usr/bin/~php |
Search the current directory tree for regular files whose names match regular expression ".+-[0-9]+x[0-9]+\.jpg" | find . -type f -regex ".+-[0-9]+x[0-9]+\.jpg" |
Remove trailing spaces, replace tabs with spaces, replace Windows CRLF with Unix LF in all *.java, *.xml and *.css files under current directory excluding ./vendor directory and its contents | find . -path ./vendor -prune -o \ -exec gsed -i -E 's/\t/ /' \{} \; -exec gsed -i -E 's/[[:space:]]*$//' \{} \; -exec gsed -i -E 's/\r\n/\n/' \{} \; |
Find all 'test' directories in the current directory tree and remove them | find . -name test -type d -print0|xargs -0 rm -r -- |
Remove all files with '.js' extension from the 'js' directory tree | find ./js/ -type f -name "*.js" | xargs rm -f |
change user and group of the file /usr/bin/aws to user amzadm and group root | chown amzadm.root /usr/bin/aws |
Find all files and directories that do not match the pattern given as the $controlchars variable | find . ! -name "$controlchars" |
search for all "tif" images in current folder | find . -name '*.tif ' -print |
Enables shell option 'failglob'. | shopt -s failglob |
Write "fifo forever" infinitely using the named pipe "fifo" by writing its contents to standard output and to "fifo" | echo "fifo forever" | cat - fifo | tee fifo |
SSH into server "server.com" as user "remote_user" | |
Removes all cached yum data from a system. | sudo yum clean all |
create directories bravo_dir and alpha_dir | mkdir bravo_dir alpha_dir |
display all files in current folder, with each file name displayed twice on same line | find . | xargs -I{} printf "%s%s\n" {} {} |
Find recursively all files whose names begin with "foo" | find . -name "foo*" |
Find all files/directories named 'document' in maximum 4 levels down the '/usr' directory | find /usr -maxdepth 4 -name document -print |
Display the host's ECDSA fingerprint using the md5 hasing algorithm. | ssh-keygen -l -E md5 -f /etc/ssh/ssh_host_ecdsa_key.pub |
Set 644 permission to all regular files under current directory | chmod 644 `find -type f` |
Prints process tree with command line arguments of a process having id $PID. | pstree -a "$PID" |
Find recursively all files whose names ends with "foo" | find . -name "*foo" |
Finds string beginning with 'IFS' in a 'set' output. | set | grep ^IFS= |
Search for 'some string' in all *.axvw files under current directory and show the matched lines with line numbers | find . -name '*.axvw' -print0 | xargs -0 grep -n 'some string' |
Print the files in the current directory as a list of comma separated values | ls | sed '$!s/$/,/' | tr -d '\n' |
Set variable 'file' to the base name of first argument to script or function, that is the part following the last slash. | file=$( basename "$1" ) |
Search the /Path/bar* directories recursively for files matching pattern "file_name*" | find /Path/bar* -name "file_name*" |
Read a line from standard input with a timeout of 10 seconds | read -t 10 |
Dump "file" as ASCII characters | od -t c file |
Search the current directory recursively for text files containing at least one character | find -type f -exec grep -Iq . {} \; -and -print |
Split "/usr/bin/firefox" into 1000 files of about equal size | split -n 1000 /usr/bin/firefox |
Find all the files in entire file system which are modified 50 days back. | find / -mtime 50 |
Archive "/path/to/files/source" to "user@remoteip:/path/to/files/destination" via ssh on port 2121 | rsync -azP -e "ssh -p 2121" /path/to/files/source user@remoteip:/path/to/files/destination |
Find files that were modified in less than 1 minute ago | find / -mmin -1 |
Recursively copy "source", "dir", and "target" to "dir" as a dry run | rsync -rvc --delete --size-only --dry-run source dir target dir |
Print the base name of the current working directory | pwd | xargs basename |
Print all filenames under /proc and below | find /proc -exec ls '{}' \; |
find all the php files | find -name '*.php' |
find all the cpp(C++ source files), java, header files in the current directory | find . -name *.cpp -o -name *.h -o -name *.java |
create a backup of all the files which have been modified in the last 48 hours | find source/directory -ctime -2 | cpio -pvdm /my/dest/directory |
Rename all *.jpg files to *.jpg$.jpg files under current directory by appending the parent directory name at the beginning of their names | find . -name '*.jpg' -exec sh -c 'mv "$0" "$(basename $)-${0%.JPG}$.jpg"' {} \; |
list *.bmp and *.txt files under the /home/user/Desktop directory. | find /home/user/Desktop -name '*.bmp' -o -name '*.txt' |
Find all regular files with '.txt' extension excluding 'README.txt' files under current directory tree | find . -type f -name "*.txt" ! -name README.txt -print |
Create a ssh tunnel on local port 2222 through "bridge.example.com" to "remote.example.com" port 22 without executing any commands and run in the background | ssh -N -L 2222:remote.example.com:22 bridge.example.com& |
Execute "generate_commands" and run the resulting commands in the current shell. | source < |
Find files that are empty | find -empty -type -f |
Find files/directories under current directory and print them | find . -print0 | xargs -0 echo |
Find all regular files under current directory tree, prepend '#' at the beginning of the lines that contain 'abc' in those files and modify them in-place | find . -type f -exec sed -i ‘s/.*abc.*/#&/’ {} \; |
Find all files/directories named 'vimrc' in the entire filesystem | find / -name vimrc |
Run 'chmod 0644' on all files in the current directory tree | find . -type f -exec chmod 0644 {} \; |
Print the files to which symbolic links in the current directory point | find . -type l -print | xargs ls -ld | awk '{print $10}' |
List recursively all files and directories in /var/www and pass the result to the `more' pager | find /var/www | more |
Find all regular files in the current directory tree ignoring directory ./source/script | find . -path ./source/script -prune -o -type f -print; |
Make 3 directories named "~/Labs/lab4a/folder" followed by the number 1, 2, or 3 | mkdir ~/Labs/lab4a/folder{1..3} |
remove all the pdf files in the current folder and do not delete those in the sub folders | find . -name "*.pdf" -maxdepth 1 -print0 | xargs -0 rm |
Delete all broken symbolic links under '/usr/ports/packages' directory tree | find -L /usr/ports/packages -type l -exec rm -- {} + |
Run script `fixname.sh' for each regular file from the current directory tree | find . -type f -exec sh fixname.sh {} \; |
Processes file as binary file, and searches for symbol by its octal value '\015'. | grep -U -l $'\015' $ |
List regular files in current directory with read, write and execute permission for all users and also show the permissions | find . -type f -perm 777 -exec ls -l {} \; |
List files under current directory according to their size in descending order | find . -type f -exec ls -s {} \; | sort -n -r |
Find all regular files with permissions 777 under and below /home/user/demo/, and change their permissions to 755 | find /home/user/demo -type f -perm 777 -print -exec chmod 755 {} \; |
Unzip and expand tar archive "compressFileName" | zcat compressFileName | tar xvf - |
find files under the current directory containing a space in the filename and delete them | find . -name "* *" -exec rm -f {} \; |
get the job number from the stored PID | jobs -l | fgrep $! | perl -ne 'print "$1\n" if /\[\]/' |
Find all files/directories that are owned by user 'wnj' and are newer than 'ttt' by modification time in the entire filesystem | find / -newer ttt -user wnj -print |
change the ownership of all regular/normal files in the current directory | find . -type f -print0 | xargs -0 chown username |
remove all the core files in the temp file after user confirmation | find /tmp -name core -type f -print0 | xargs -0 /bin/rm -i |
List .c files in the current directory | find . \( ! -name . -prune \) -name "*.c" -print |
Search for line 111 in file "active_record.rb" with 2 lines of context | nl -ba -nln active_record.rb | grep -C 2 '^111 ' |
search for the file "process.txt" in the current folder (case insensitive search) | find . -iname 'process.txt' -print |
sort and display top 11 files along with the last access date for all the files in the file system | find / -type f -printf "\n%AD %AT %p" | head -n 11 | sort -k1.8n -k1.1nr -k1 |
Find all the files without permission 777 in the file system | find / -type f ! -perm 777 |
Replace the "openssl" command executable with a symbolic link to "/usr/local/ssl/bin/openssl" | sudo ln -sf /usr/local/ssl/bin/openssl `which openssl` |
Set variable PING to 1 if it's possible to ping host ADDRESS, to 0 otherwise. | PING=$ |
search for the directory "ora10" in the entire file system | find / -type d -name "ora10" |
delete all the empty files in the current directory | find . -empty -exec rm {}\; |
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