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Monitoring background Jobs on UNIX systems

Posted on February 6th, 2010 in Oracle on Linux monitor background jobs on UNIX, UNIX commands

To monitor background jobs on UNIX, you can use the following commands :

• jobs
• ps

jobs command

jobs command will list all the jobs running in the background as follows:
[1]  – 12427 Running              test.pl
[2]  + 12540 Stopped            myprog.pl

The value within “[]” is the job number. By this number you can control our jobs, like you can kill job or  bring the job to foreground.

ps command

ps    command will display a list of processes as follows

PID TTY      TIME CMD
12427  pts/10   1:07  test.pl

Where

• PID – Process identification number. By this number you can kill the process.
• TTY- terminal name where the process is executing
• TIME – time elapsed
• CMS- the process name, your script or program name

Bringing Job to the Foreground

Please remember, a background job may be brought to the foreground if it was initiated during the current login session. Jobs which were initiated during other login sessions and which are still running cannot be brought to the foreground. However, it is possible to send signals to such jobs using the “kill” command. A background job or a stopped job may be brought to the foreground with ” fg” command.

fg  %1 , 1 is the job number

Terminating Background Jobs

Jobs from the current session can usually be terminated by bringing them to the foreground and interrupting them with control-c key.

Another way for terminating jobs running under your user id  with  “kill” command.

Different way to terminate a job

By job id number as follows :

kill -9 %1

By Process Id (PID) as follows :

kill -9 PID

Please remember with kill you can not only terminate jobs for current session, you can terminate jobs initiated by other user login session also.

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