Failed to start LSB: Bring up/down networking 虚拟机不能上网
1.禁用NetworkManager
systemctl stop NetworkManager
systemctl disable NetworkManager
systemctl restart network
2.修改mac地址
使用ip addr查看mac地址
网卡的mac写到配置文件里：
vim /etc/sysconfig/network-scripts/ifcfg-xxx xxx为对应名称
添加：HWADDR=xx:54:22:2f:xx:33