sharing

So here's the deal I recently got into the whole server world, remote login, file sharing and all the cool stuff you can do with dedicated/semi dedicated machine. I started out testing with an old computer I had lying around, though I only had the possibility to run Debian on a USB flash drive...

Hello guys! Does anyone know how to share a internet connection between a linux (mandriva or VM Ubuntu 12) and osx 10.8.2? This is what I'm trying to do: My linux connects to the internet via wlan0, and I want to share it to the mac via eth0. Any clues? Thx