sudo apt-get install -y hubzero-openvz-repo sudo apt-get update
sudo apt-get install -y hubzero-openvz
sudo hzcms configure openvz --enable
If configuration is successful it should prompt you to reboot the server to activate the new kernel.
sudo vzlist Container(s) not found
Or it will list the containers currently running if you check this on a running hub. The salient point being that the command doesn't issue any kind of error message.