Ubuntu is a derivate of Debian Linux.
- Ubuntu Release overview as well as EOL (end of life): https://wiki.ubuntu.com/Releases
As I don't like Unity at all, I recently checked out two of the available Ubuntu alternatives:
Another project I find very interesting is Mythbuntu.
Mythbuntu is an official Ubuntu flavor focused upon setting up a standalone MythTV based PVR system.
Other Ubuntu stuff:
A Better Ubuntu Mirror
Choose a better (i.e. faster AND up to date) Ubuntu mirror: https://launchpad.net/ubuntu/+archivemirrors
The default mirror for Germany is too slow - so I changed my sources.list with vim as follows: