Solutions for “This system is not registered” on Red Hat/ Centos 8 Step 1: in the plugin configuration file disable plugin. Change the enabled from “=1” » to “=0” # vim /etc/yum/pluginconf.d/subscription-manager.conf enabled=0 Step 2: disable the subscription manager repository by below command # subscription-manager config –rhsm.auto_enable_yum_plugins=0