Andrew makes an excellent point!

Solaris and HPUX killall kills _ALL_ processes while Linux/IRIX killall only 
kills all instances of the specified process.
This is a trap many linux users fall into while working with other OSes.

----- Original Message ----- 
From: "Andrew Sullivan" <ajs at crankycanuck.ca>

> . . .if someone is naturally pulling out the -9
> cannon-cum-flamethrower, it's worth pointing out that "killall" is
> different on Linux than some other systems, and you'd _better be
> sure_ what system you're using before you go using that command.
> Remember: man pages are your friend.