Redhat Subscription

curl -k -LO https://sateliteserver.example.com//pub/katello-ca-consumer-latest.noarch.rpm
sudo rpm -i katello-ca-consumer-latest.noarch.rpm
sudo subscription-manager register --org="MYORG" --activationkey="mykey"
sudo subscription-manager refresh
sudo subscription-manager attach --auto
sudo subscription-manager status
# sudo subscription-manager repos --enable=*   # uncomment to enable all or select one at a time in  redhat.repo

sudo subscription-manager refresh
sudo subscription-manager attach --auto
sudo subscription-manager status

or

subscription-manager refresh
subscription-manager repos --enable=*
yum clean all 
# yum upgrade -y —nogpgcheck