Systems must be registered before updates from RHN can be applied. This can be done via System -> Administration -> Software Update and in earlier versions via Applications -> System Tools -> Software Updater. It can also be accessed via the command line by using the “rhn_register” command. Registration requires local root access and a valid RHN login that has an unused Update or Management entitlement for the new system you want to register.

Manually selecting updates from the Red Hat Network

It may be necessary to apply only certain updates, for instance, those advisories that are tagged as fixing security issues (RHSA) or bug fixes (RHBA).

To manually select updates:

1.Log into Red Hat Customer Portal.

2.On the Subscriptions -> Classic Management -> Registered Systems page, select which system you want to update.

3.Click the Software tab.

4.Click the Errata tab.

5.Select the errata you want to apply.

6.Click “Apply Errata” at the bottom right of the page.

7.On the actual system you want to apply these updates to, run the following command (or place it in a cron job):

# rhn_check