cenots防火牆添加端口提示權限不足

    問題：Centos 7 Authorization failed. Make sure polkit agent is running or run the application as superuser？

    解決方法：1.切換到root用戶     

                      [cqs@centos7 ~]$ su root

                      2.使用具用root權限用戶

                     [cqs@centos7 ~]$sudo firewall-cmd --permanent --add-port=3306/tcp