mjhjmtu

I run command ps -A | grep <application_name> and getting list of process like this:

19440 ? 00:00:11 <application_name>
21630 ? 00:00:00 <application_name>
22694 ? 00:00:00 <application_name>

I want to kill all process from the list: 19440, 21630, 22694.

I have tried ps -A | grep <application_name> | xargs kill -9 $1 but it works with errors.

kill: illegal pid ?
kill: illegal pid 00:00:00
kill: illegal pid <application_name>

How can I do this gracefully?

pkill -f <application_na>

Will kill all the processes that contain the pattern <application_na> in their names.

man pkill

The problem is that ps -A | grep <application_name> | xargs -n1 returns output like this

19440
?
00:00:11
<application_name>
21630
?
00:00:00
<application_name>
22694
?
00:00:00
<application_name>

You can use awk to a get first a column of ps output.

ps -A | grep <application_name> | awk 'print $1' | xargs -n1

Will return list of PIDs

19440
21630
22694

And adding kill -9 $1 you have a command which kills all PIDs

ps -A | grep <application_name> | awk 'print $1' | xargs --no-run-if-empty kill -9 $1

killall can do that.

$ killall application_name