Chapter 7. Managing systems

Subscriptions are available to a system based on whether the software is compatible with the system’s architecture. For example, there are different products and subscriptions for 32-bit and 64-bit platforms. Red Hat Subscription Management determines compatibility by collecting a range of facts about the system’s hardware and architecture and then comparing it with all available subscriptions.

7.1. Checking system facts

Updating the facts resends the information about the system to the Red Hat subscription service so that it can update the list of subscriptions which match the system architecture. Updating the facts is a recommended after hardware upgrades or other important system changes.

Procedure

  1. From the Systems page, click the appropriate system.
  2. Click the System Facts tab.
  3. System facts including the UUID, architecture, and memory display.

7.2. Regenerating identity certificates

Although credentials are not normally required with the identity command, using the '--force' option will require the username and password and will cause the Subscription Manager to prompt for the credentials if they are not passed in the command. This can be helpful if the identity certificate needs to be regenerated using a different Red Hat account than the original registration.

Procedure

  1. From the Systems page, click the appropriate system.
  2. Click the Subscriptions tab.
  3. Click Download Certificates.

7.3. Attaching a subscription to a system

Subscription entitlements do not get used until they are attached to a system that needs it. Attaching a subscription is the next step after registration to RHSM.

Procedure

  1. From the Systems page, click the appropriate system.
  2. Click the Subscriptions tab.
  3. Click Attach Subscriptions.
  4. Select the appropriate subscriptions, and click Attach Subscriptions.
Note

By default, all subscriptions attached to your account populate when you attach subscriptions. Selecting the Only show subscriptions that match this subscription type option can prevent you from attaching subscriptions that are not usable by the system.

7.4. Removing a subscription from a system

If a subscription has expired or you want to clear up an entitlement for another system, you can remove a subscription from a system manually.

Procedure

  1. From the Systems page, click the appropriate system.
  2. Click the Subscriptions tab.
  3. Click Remove next to the appropriate subscription.
  4. Confirm the removal by clicking Remove Subscription.

7.5. Removing a system

Removing a system from your account destroys it completely. You can no longer register or attach subscriptions to it, and it no longer receives applicable erratum notifications. Having systems that are no longer active on your account can cause backlog and lag issues when performing account-wide maintenance.

Procedure

  1. From the Systems page, click the appropriate system.
  2. Click Remove System.
  3. Click Remove. The system cannot be recovered after performing this action.