2.3. Unregistering

The only thing required to unregister a machine is to run the unregister command. This removes the system's entry from the subscription service, removes any subscriptions, and, locally, deletes its identity and subscription certificates.
From the command line, this requires only the unregister command.

Example 3. Unregistering a System

[root@server1 ~]# subscription-manager unregister
To unregister from the Subscription Manager UI:
  1. Open All Applications > Red Hat Subscription Manager.
  2. Click Unregister.
  3. Confirm that the system should be unregistered.