OT Regular Expression [grep]

I know this is off-topic but what I'm using it for will be in a PHP script! All you who are grep-masters I have a question. I would like to find all processes by a given user on a linux box and kill them. I know this much: ps -u username Now, do I then pipe that to grep somehow and get just the PID's? How can I do this quickly and easily? -- Thomas Deliduka IT Manager ------------------------- New Eve Media The Solution To Your Internet Angst http://www.neweve.com/