file compare tool?

["Don Russell" <fedora drussell dnsalias com>]

I am looking for a tool I can use to compare two files, and show me the differences in a side-by-side view. Ideally, I'd like a view like SVN does via the httpd interface... i.e. one side has removed code shown in a red/pink background, the other side shows new code in green...

It would be perfect if I could use it is a command line tool, and then it would display the results in an X window (based on the DISPLAY env setting...

Any suggestions?

Thanks very much,
Don


-- 
There are 10 types of people in the world: those who understand binary, and those who don't. :-)