Script - kill all users except root via 'skill'

Eventually you'll get to the point where you need a script that just kicks all the users off except the 'root' account (provided you're logged in as root or su).

This script:

checks to see that the user running the script is 'root'
does a 'w' listing (shows who's currently logged on) and an inverted grep '-v' to find the users
kills off the user accounts with 'skill'

(Enter other account exceptions into the bold text)

----------------------------------------------------------
#!/bin/bash
# logoffeveryone.sh
# Written by Andrew Elliott, 9-APR-2009
#

USER_LOG=/root/loggedonusers.txt
ROOT_UID=0

if [ "$UID" -ne "$ROOT_UID" ]
then
echo "Must be root to run this script!"
exit
fi

cd /root

echo "-----------------------------" > $CHAGE_LOG

w | cut -f 1 -d " " | grep -v 'root' | grep -v 'anyotheruser' | while read TEMP1
do
echo "Logging off user: $TEMP1"
skill -KILL -u $TEMP1
done

exit 0
----------------------------------------------------------