CentOS7 突然连不上网,报错"FailedtostartLSB:Bring up/down networking"

报错：FailedtostartLSB:Bring up/down networking

解决办法：
#禁用NetworkManager
systemctl stop NetworkManager

systemctl disable NetworkManager

重启网络
systemctl restart network
这样我的问题就解决了

如果还不行，就修改网卡配置文件中的mac地址