Register and automatically subscribe in one step
# subscription-manager register --username --password --auto-attach
Assign the system to an organization
# subscription-manager register --org= --activationkey=
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=
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
