This site provides a variety of downloads and howto’s to facilitate use of the Xen Virtual Machine Monitor. Xen allows you to run multiple operating systems on a single piece of physical hardware. Here you will find Linux distributions that can run as Xen guests out of the box, obviating the need to create your own custom filesystems. The filesystems on this site have already been tweaked to deal with Xen’s idiosyncracies, and are also designed to be lightweight and minimally divergent from the original distribution.