[ Thanks to An Anonymous Reader for
this link. ]
“Linux had always lacked a Open Source virtualisation technology
in the same league as Solaris containers or commercial product like
Vmware. That was until Xen came into the picture. Xen is an
opensource virtual machine monitor for x86 that supports execution
of multiple guest operating systems. Xen is released under the GPL
and can easily be used to run virtually, OSes as diverse as
different Linux distributions, BSD’s and even windowsXP (though
windows port is not available because of licencing restrictions).
Virtualisation technologies are nothing new, what with Vmware,
Usermode Linux, Win4Lin and others available. But Xen is relevant
here because of the support for it from Redhat, GPL-ed licence and
also its active development…”