注册和激活
subscription-manager register --username uesrname --password password --auto-attach
检查状态
subscription-manager list --available --all
之后就可以执行 yum install 等命令了
unregister
subscription-manager unregister
redhat
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/
https://access.redhat.com/documentation/zh-cn/red_hat_enterprise_linux/7/
https://developers.redhat.com/products/rhel/download/
https://developers.redhat.com/rhel8/getrhel8/