3.13. Attaching Red Hat subscriptions

Using the subscription-manager command, you can register and attach your Red Hat subscription to a RHEL instance.

Prerequisites

Procedure

Register your system:
```
# subscription-manager register
```
Attach your subscriptions:
- You can use an activation key to attach subscriptions. See Creating Red Hat Customer Portal Activation Keys for more information.
- Otherwise, you can manually attach a subscription by using the ID of the subscription pool (Pool ID). See Attaching a host-based subscription to hypervisors.
Optional: To collect various system metrics about the instance in the Red Hat Hybrid Cloud Console, you can register the instance with Red Hat Lightspeed.
```
# insights-client register --display-name <display_name_value>
```
For information about further configuration of Red Hat Lightspeed, see Client Configuration Guide for Red Hat Lightspeed.