CentOS网络服务起不来 Job for network.service failed

今天虚拟机 连接不上，ping ip不通

[root@centOS ~]# systemctl start network.service

Restarting network (via systemctl): Job for network.service failed because the control process exited with error code.

See “systemctl status network.service” and “journalctl -xe” for details.

[root@centOS ~]# systemctl status network.service

[root@centOS ~]# journalctl -xe

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，而且NetworkManager在网络断开的时候，会清理路由，如果一些自定义的路由，没有加入到NetworkManager的配置文件中，路由就被清理掉，网络连接后需要自定义添加上去。

解决方法：

1.将networkmanager服务停了

systemctl stop NetworkManager
systemctl disable NetworkManager

2.重启网卡，就ok了

systemctl restart network
systemctl status network

#查看所有已安装服务

systemctl list-units --type=service