'''[https://virt-manager.org/ Virt-manager]''' uses '''[http://libvirt.org/ libvirt]''' and it's a manager of many '''[https://libvirt.org/drivers.html hypervisors]''', including the one that we want to use here: QEMU/KVM.
Virt-manager uses libvirt and it's a manager of many hypervisors, including the one that we want to use here: QEMU/KVM.