I recently heard that Debian or Slackware was the best distros to learn networking or I guess real linux with, is this true?

Slackware is the truest, purest, most UNIX-like Linux distribution.
It is great to learn *nix on Slackware. I ran Debian for a few months,
it has some benefits, also.

I would first start learning the filesystem. Very important. You need to know where stuff is located. Its the building blocks. knowing where your logs are kept, where your configs are stored, etc is essential regardless of what distro you begin with. When you get to understanding the basics of how the system works you can pritty much use any distro. Everything is basicly the same overall with small differences easly learnable. I would stick to your current fedora distro, thats what I started on....if you learn on one linux distro you can goto a fully unix OSX and start configuring cups and your .ppd in the same folder your would in redhat. So pick something that fits your needs. And Learn.

Thanxs a bounch GUIPenguin for the advice, I'll stick to Fedora and just learn from there and then move on to the next distro. Also thanxs to you too Chinaman.