How to choose the RIGHT PID?

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# 1  
Old 08-08-2013
How to choose the RIGHT PID?

I can find a single PID and copy it to a variable (thanks to the forum), but I have a slightly tougher situation:

When a user logs into our system, it creates 5 processes

root     21160  3096  0 07:16 ?        00:00:00 sshd: cs113 [priv]
cs113    21164 21160  0 07:16 ?        00:00:00 sshd: cs113@pts/23
cs113    21165 21164  0 07:16 pts/23   00:00:00 -bash
cs113    21186 21165  0 07:16 pts/23   00:00:00 -bash
cs113    21195 21186  0 07:16 pts/23   00:00:01 rtssyn SYNDRV CS

Sometimes, the user gets logged in multiple times and the system won't let them back in. I want to write a script to identify the PIDs of the user and kill them, so they can log back into the system. To do this currently, I am manually grepping for the PIDS using:

ps -ef | grep cs113

and I get the result posted in the example. I then proceed to kill the process for cs113 that is owned by root to kill the user's login. example from above:

kill 21160

Depending on how many logins are in the system, I have to manually kill multiple PIDs.

Again, is there a way to automate the process?

Last edited by Scott; 08-08-2013 at 03:18 PM.. Reason: Please use code tags
# 2  
Old 08-08-2013
try code below to kill all the user's ssh logins at once ...
kill -9 $(ps -ef | grep $user | grep root | awk '{print $2}')

# 3  
Old 08-08-2013
Or use pkill

First of all run pgrep and verify if you are getting the correct PID:
pgrep -U cs113 sshd

If the PID is correct, then use pkill:
pkill -U cs113 sshd

# 4  
Old 08-08-2013
Awesome! Thanks all!
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