How do you edit a file in shell?
 

I know I've read it before, but I'm trying to edit a file on my server through the shell. Can anyone help me out? Is there a guide on this online anywhere?

Most distro's come with nano or pico, about the same thing.
http://www.gentoo.org/doc/en/nano-basics-guide.xml

Thanks, that's what I was looking for.

For more advanced editors, vi is available in the command line, as well as numerous clones of vi. I think emacs also has a command line mode, tho i never used this editor enough to find out how to do it.