Check out this excellent Linux distribution family tree and timeline. It’s been making the rounds so chances are you’ve already run across it but this is so cool I couldn’t pass up mentioning it. I’m currently running the Debian-derived Ubuntu, but for years this site ran off of Redhat 4-5-6-7. For a good part of the Redhat years I tried to get going with Debian but always failed to get x up and running on my video cards. Knoppix was the first Debian-derived distro I could run, and I almost switched to it from Redhat at one point back in ~2003. Looking over that chart brings back a lot of memories, too, of me tinkering with all the different distros over the years trying to find the one true distro to rule them all.

Anyway, worth a look, Linux fan or no, just to get a sense of the history of it all.