Building a Home File Server

With three desktop machines (Kubuntu, Win XP and a testbed, which is currently running ReactOS) and a laptop (Xubuntu) in use at home, our IT is reaching small office proportions, and like many small offices, we run into file sharing problems. Peer-to-peer networking is fine when all the machines are on, but inevitably it happens that the file I want is on a PC that isn’t running. Even worse, it be on my testbed machine that is currently in pieces or undergoing yet another upgrade. So, we need an always-on server that any of us can access any time, but if it is always on, it needs to be quiet, reliable and cheap to run.