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1. libvirt
The libvirt library is used to interface with different virtualization technologies. Before getting started with libvirt it is best to make sure your hardware supports the necessary virtualization extensions for KVM. Enter the following from a terminal prompt:
kvm-ok
A message will be printed informing you if your CPU does or does not support hardware virtualization.
On many computers with processors supporting hardware assisted virtualization, it is necessary to activate an option in the BIOS to enable it.