突然虚拟机无法联网解决办法，且报错Failed to start LSB: Bring up/down

使用sudo service network restart去启动网络时起不来

使用systemctl status network.service查看网络状态也是failed，且报错Failed to start LSB: Bring up/down

解决办法：

依次执行以下指令

systemctl stop NetworkManager

systemctl disable NetworkManager

重新启动网络：

systemctl start network.service