If you want to list all the containers on the server instead of just the containers that are currently running on the server, you will need to add -a after vzlist. This will tell vzlist to include all of the containers that are created on the node inside its output:

vzlist -a

In the previous example, we used the vzlist command with an -a flag to tell vzctl that we want to list all of the containers that have been created on the server.