If you have a zombie user logged into a server, or you want to force a user to logout use the “who” command. Type “w” or “who” in a command prompt to see which users are logged in, and then use the pkill command to force them out. pkill -KILL -u “username” Pop in a particular username and boot them out the door.
# w
18:15:35 up 51 days, 20 min, 2 users, load average: 0.00, 0.01, 0.00
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
test pts/0 :1.0 21Dec11 44days 0.03s 0.03s bash
root pts/1 10.31.8.75 18:08 0.00s 0.19s 0.02s w
# pkill -KILL -u test
# w
18:18:10 up 51 days, 23 min, 2 users, load average: 0.00, 0.00, 0.00
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/1 10.31.8.75 18:08 0.00s 0.20s 0.02s w
