重启网卡也提示Bringing up interface eth0: Device eth0 does not seem to be present,delaying initialization.

1、重启网卡提示Bringing up interface eth0:  Device eth0 does not seem to be present,delaying initialization.            
2、这是因为克隆的机器没有正确的mac,UUID信息冲突导致的，首先将/etc/udev/rules.d/70-persistent-net.rules文件清空：
3、rm -f /etc/udev/rules.d/70-persistent-net.rules文件删除（或者重命名）：cat /etc/udev/rules.d/70-persistent-net.rules
4、然后将网卡配置文件/etc/sysconfig/network-scripts/ifcfg-eth0的uuid和hwaddr这两行删除：
5、执行reboot命令，重启系统