#!/bin/bash
loggedinusers=$(who -q | sed -n 's/# users = (.*)/1/p') # Pull number of logged in users

for ((i=1; i<=loggedinusers; i++)); do
    lastUser=$(last |grep "logged in" |sed -n "$i p"|awk '{print $1;}')
    echo "Last User: $lastUser" #Debug
    echo "Current User: $3"     #Debug
    if [ "$3" != "$lastUser" ]
    then
        echo " $lastUser was logged off" #Debug
        pkill -u $lastUser loginwindow
    fi
done
exit 0