Xen is an open source virtual machine system. More information on Xen itself can be found at https://wiki.xensource.com/xenwiki/ and the Fedora Xen page.
Fedora is following the 3.0.x Xen line. Xen 3.0.0 was released in
December of 2005 and is incompatible with guests using the previous Xen
Setting up Xen and guests should be significantly more
straight-forward with Fedora Core 5 than it previously was with Fedora
Core 4. Here's a run-through of what is required to configure a system
as a Xen host as well as setting up Xen guests.
Your system must use GRUB, the default boot loader for Fedora1
Sufficient storage space for the guest operating systems. A
minimal command-line Fedora system requires around 600MB of storage, a
standard desktop Fedora system requires around 3GB.
Generally speaking, you will want to have 256 megs of RAM per
guest that you wish to install. This is largely due to memory
requirements for the installation and will hopefully be less by the
time FC5 is released.
Support is present for both x86 and x86_64 systems
Commands which require root privileges are prefixed with the
character '#'. To become root, issue the command 'su' as a normal user
and supply the root password. Alternatively, use another system such as
'sudo' if you have it setup.