解决报错Failed to start LSB: Bring up/down networking：MAC地址导致

1.场景描述，我在电脑里装好的虚拟机，今天突然就网络无法打开，并出现如下报错：

[root@ansible-control ~]# systemctl start 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@ansible-control ~]# systemctl status network
● network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)
Active: failed (Result: exit-code) since 日 2019-09-29 22:44:34 CST; 1s ago
Docs: man:systemd-sysv-generator(8)
Process: 5042 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)

2.解决方法

关闭NetworkManager，罪魁祸首就是这个服务！

第一步：查看NetworkManager服务状态：

systemctl status NetworkManager
一般是开启的状态！

第二步：关闭NetworkManager，并设置开启默认不启动该服务：

systemctl stop NetworkManager
systemctl disable NetworkManager

第三步：重启network服务

systemctl status network.service

第四步：再次重启网络

systemctl restart network
systemctl status network

此时已经成功开启网络！
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