title: Cron job mysteriously stopped running?
body: <p>I have a cron job on an Ubuntu 10.4 server that stopped running for no apparent reason.  (The job ran for months and has not been changed.)   I am not a *nix guru so I plead ignorance if this is a simple problem.   I can't find any reason or indication why this job would have stopped.   I've restarted the server without success.  Here's the job:</p>
  
  <pre><code># m h  dom mon dow   command
  0 * * * * java -jar /home/mydir/myjar.jar &gt;&gt;/home/mydir/crontaboutput.txt
  </code></pre>
  
  <p>The last line in the output file shows that the program ran on 8/29/2012.   Nothing after that.  </p>
  
  <p>Any ideas where to look?</p>