For quite some time I use my Ubuntu machine as a file and backup server for all Macs in my network which is perfectly accessible from the Finder in Mac OS X. More here

Although this Tutorial involves using the Terminal in Ubuntu and looks a bit geeky it’s very easy even for beginners. I have tried to explain all steps and Terminal commands so you may learn a bit about the Terminal too. At the end of the article you can download my Server Displays icon pack quickly made by me with custom icons for a Mac, Ubuntu and Windows server.