"This Howto covers the installation of XenServer 5.5.0 and the
creation of virtual machines with the XenCenter administrator
console. XenServer is a free virtualization platform from Citrix,
the company behind the well known Xen virtualization engine.
XenServer makes it easy to create, run and manage Xen virtual
machines with the XenCenter administrator console. The XenServer
installation CD contains a full Linux distribution which is
customized to run XenServer."