How to Register and Enable Red Hat Subscription, Repositories, Patching

Register and automatically subscribe in one step

          # subscription-manager register --username <username> --password <password> --auto-attach

Assign the system to an organization 

          # subscription-manager register --org=<org id> --activationkey=<key>

To get a list of all your available subscriptions 

          # subscription-manager list -available

List all available repos for the system

          # subscription-manager repos --list

Enable subscription-manager Repositories

          # subscription-manager repos --enable rhel-7-server-optional-rpms

To get consumed subscription and its serial number

          # subscription-manager list --consumed

To remove selected subscription

          # subscription-manager remove --serial=<serial_number_obtained from previous step>

To remove all subscriptions

          # subscription-manager remove --all

To unregister a system registered with a Red Hat Subscription Management server

          # subscription-manager unregister

          # subscription-manager clean

To completely update system

          # yum update

To update security patches only

          # yum update --security --exclude=kernel*

To check Red Hat Release and kernel version

          # cat /etc/redhat-release

          # rpm -q kernel --last

          # uname -a