提示：systemctl restart sshd

rootanode6 ~]# vi /etc/ssh/sshd config

job for sshd.service failed because the control process exited with error code. See "systemctl

Is sshd.service" and "journalctl -xe" for details.

提示：/var/run/yum.pid 已被锁定，PID 为 21463 的另一个程序正在运行。Another app is currently holding the yum lock; waiting for it to exit

删除该ID:rm - rf /var/run/yum.pid

yum repolist提示没有挂载: