Remembering how to use Xen

I have not created a virtual machine with Xen in a few years. I want to create one for GNU BLAG/Linux so that we can upgrade the main box that the team use to build RPM packages. Let's see how this works.

chkconfig --list | grep virt

Note: This output shows SysV services only and does not include native
      systemd services. SysV configuration data might be overridden by native
      systemd configuration.

libvirt-guests  0:off 1:off 2:on 3:on 4:on 5:on 6:off
libvirtd        0:off 1:off 2:off 3:on 4:on 5:on 6:off