1. login as root 2. change configuration # virsh dumpxml guestname > /root/guestname.xml (backup configuration) # vim /root/guestname.xml (change configuration) # virsh define /root/guestname.xml (enable changes) 3. shutdown guest # virsh shutdown guest or with virt-manager 4. start guest # virsh start guestvm URL: https://help.ubuntu.com/community/KVM/Managing