clarification

desiretolearn · 02-03-2014, 03:10 AM

hi guys
i had written a shell script Display Information of all the File Systems
i want to find the pid and kill the process after few minutes.how can i obtain the pid and kill it???

emp.sh

Code:

df -a >> /tmp/sample.log

and my cron to execute every minute every hour every day

Code:

* * * * * /tmp/emp.sh

colucix · 02-03-2014, 03:17 AM

Do you mean you want to kill the df process if it hangs for some reason? Try

Code:

df -a >> /tmp/sample.log &
while ps $! > /dev/null
do
  sleep 300
  kill -9 $!
done

This will kill the process after 5 minutes. $! is the PID of the last background job.

desiretolearn · 02-03-2014, 03:24 AM

what i meant was my
cron:

* * * * * /tmp/emp.sh
wil execute my script every minute i want to find its pid and kill it at some point in time

colucix · 02-03-2014, 03:34 AM

In that case you can retrieve the PID of the process using pgrep or kill it at once using pkill:

Code:

pkill -9 -f emp.sh

this doesn't prevent the process to start again at the next minute, anyway.

desiretolearn · 02-03-2014, 03:40 AM

i can directly write it on my console and kill it or should i include tis in my script

this is really silly i know please bear with me i am new to this scripting

colucix · 02-03-2014, 03:57 AM

You can do it directly on the console. If you want to do it automatically, then you may think to put a while loop inside the script itself. May I ask what is the problem with this script? Why do you need to kill it and then restart it every minute from the crontab?