HowtoForge website published tutorial that provides step-by-step instructions on how to install Xen 3.3.1 on a Debian Etch (4.0) system.

Xen allows anyone to create guest OS (Unix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host OS (dom0). With Xen we can separate applications into different VMs which are fully independent from each other while residing on the same physical machine.

The HowtoForge's user "Falko" says that they use Debian Etch system with the hostname server1.example.com and the IP address 192.168.0.100 as the host system (dom0) in the tutorial. They also use Debian Etch for the virtual machines (domU) as well. The user says that the guide explains how to set up image-based virtual machines and LVM-based virtual machines.

Find tutorial here: http://www.howtoforge.com/virtualization-with-xen-3.3.1-on-debian-etch