Chess Software and Linux

People just try Linux Ubuntu.
It's free, complete and there are 3 versions of it.
- A pc edition running on Intel x86-based systeems (including Intel Pentium and AMD atlon)
- A 64 bit edition running on AMD64 or EM64T based computers (Athlon64, Opteroj, Em64T Xeon
- A Mac edition running on modern G3, G4 and G5 computers, including iBooks and Powerbooks.
The source code for Ubuntu can be downloaded from archive.ubuntu.com
Its time to get a new laptop and I'm in a quandry. Vista sucks, Mac is overpriced and overhyped (Coolness is not a selling point. If I were interested in cool I wouldn't have been playing chess for the last 40 years). I'm interested in going back to Linux but there seems to be a lack of chess software, especially in the database area. I know for playing engines like Shredder are available. SO does anyone know a good database, comparable to Chess Assistant or Chess Base?