报错

[root@c1 ~]# systemctl restart network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[root@c1 ~]# 

解决方案

临时关闭
systemctl stop NetworkManager
永久关闭
systemctl disable NetworkManager
重启
systemctl restart network

原因：

在CentOS系统上，目前有NetworkManager和network两种网络管理工具。如果两种都配置会引起冲突。由于一般我们都是使用 network 配置静态ip，可能是关机（某种缘故）导致NetWorkManager自动配置，发生了冲突，所以把它禁用掉就好了。