unbeatable apache process, cannot be killed [SOLVED]

Have you ever tried killing apache2 process in ubuntu

To list apache processes:

ps -ef | grep apache2


To kill a process xxxx:

sudo kill -9 xxxx


But the strange thing is that even after performing the kill -9 (like forcing it rather than asking nicely), the process still there when look for apache2 process



To solve the problem is do the below *FINISH HIM* :P  command 

sudo killall -9 apache2


resource: 
http://askubuntu.com/questions/56295/not-able-to-stop-apache-processes