Force logout a user

I When I logged into the machine as root and typed who to see which users are logged in, I found somebody else too logged in as root

devuser pts/0 2011-11-18 09:55 (xxx.xxx.xxx.xxx)
root pts/1 2011-11-18 09:56 (xxx.xxx.xxx.xxx)
testuser pts/2 2011-11-18 14:54 (xxx.xxx.xxx.xxx)
root pts/3 2011-11-18 14:55 (xxx.xxx.xxx.xxx)

How can I force a root user at pts/3 to logout?

1

3 Answers

You terminate a session by killing its parent process, called the session leader. Find out which process it is with:

ps -dN|grep pts/3

3

To kill and logout a user, you can send KILL signal. Type the following command:

# skill -KILL -u vivek

Check these links for more information:

7

Improving a bit Fabel's answer above:

\# *for pid in $(for ptsn in $(w | grep **user_name** | grep pts | awk '{print $2}'); do ps -dN | grep "$ptsn " | awk '{print $1}' ; done); do kill -9 $pid; done*

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