two questions-linux noob
 

what are the two package managment tools used in Linux distros?and what is a repository?thanks

Well, the package management system varies depending on what distro you're using. Debian (and derivatives like Ubuntu) use dpkg and apt-get (or aptitude) for package management. I think OpenSuse uses Yast. Fedora I think uses rpm.

A repository is an online collection of software. There are different repo's for different distros. Some are officially supported and some are unofficial (community supported).

Thanks a lot man :D

I got a couple of more questions
 

what is the simplest revision control system in common use?
what is the difference between CVN and SVN?
what is a tarball?

thanks a lot~

1) No idea.
2) No idea.
3) Try google. The first entry on Wikipedia will probably suffice...;)

Are these homework questions?

Typically people will ignore you for trying to get answers to homework...:tisk: