Sometimes you may encounter some user programs or script hogging your Machine performa, this may couse by Bug on the application or exploit, so we may need to do fast killing all his/her process, this can be done by folowing script, safe it on your /usr/local/bin/kill-user #!/bin/bash USER=$1 USERNAAM=`basename $0` if [ ! -n "$USER" ] then echo "Usage: $USERNAAM username" >&2 exit 1 elif ! egrep "^$USER:" /etc/passwd >/dev/null then echo "User $USER does not exist!" >&2 exit 2 fi PIDS=`ps -U$USER | grep -v PID| awk '{print $1}'` echo "Killing " `echo $PIDS | wc -w` " processes for user $USER." for PID in $PIDS do kill -9 $PID 2>&1 >/dev/null done echo "User $USER has " `ps -U$USER | grep -v PID | wc -l` " processes still running."

after that script has been saved in binary folder then the script must be executable
do this: root@www:~ # chmod 755 /usr/local/bin/kill-user

In practice: root@www:~ # kill-user jerry Killing 10 processes for user jerry. User jerry has 0 processes still running.