1. Set up the Internet Agent: https://www.cnblogs.com/jjzd/p/6946215.html
2. Use yum to install the software, tips
This system is not registered with an entitlement server. You can use subscription-manager to register.
Modify the file /etc/yum/pluginconf.d/subscription-manager.conf, the modification is enabled = 1 enabled = 0
Solution: https://www.jianshu.com/p/7f22bb72a681
163 Mirror Website: http: //mirrors.163.com/centos/7/os/x86_64/Packages/