Virtualization allows running several OSes in the same time on the same hardware server. Xen is a (free) virtualization technology that allows modified OS (Xen-aware) to run as virtual machines. Each virtual machines (AKA domU) has it’s own ressources and don’t overlap with others. With a CPU that provides hardware virtualization (VMX), one can also run “native” OS like Microsoft Windows, FreeBSD or OpenSolaris.
Here’s how I installed and configured my Xen environment.
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