Answers for "This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register."

This system is not registered with an entitlement server. You can use subscription-manager to register.

In the plugin configuration file disable plugin

vim /etc/yum/pluginconf.d/subscription-manager.conf

enabled=0

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

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