虚拟机备份转移后,网络启动异常,提示“SIOCSIFADDR: No such device”
  he problem lies in the fact that ethernet MAC addresses are cached.
  You need to remove a file to clear the cached value:
  问题是由于以太网MAC地址被缓存。 你需要删除一个文件来清除缓存值:
  $ sudo rm /etc/udev/rules.d/70-persistent-net.rules
  $ reboot
  重启后恢复正常!