yum安装时提示：This system is not registered with an entitlement server. You can use subscription-manager

问题

 原因

Subscription Manager订阅管理器，它会让你一直register，禁用就好。

解决

[root@localhost ~]# vim /etc/yum/pluginconf.d/subscription-manager.conf

[main]
enabled=0           #将它禁用掉