无论是Hyper-v还是Vmware，克隆出来的CentOS Linux网络都是无法连接，及时安装对了网卡
ifconfig无法看到eth0，重启网卡出现如下错误
Bringing up interface eth0: Device eth0 does not seem to be present,delaying initialization. [FAILED]
解决办法：
首先，打开/etc/udev/rules.d/70-persistent-net.rules内容如下面例子所示：
vi /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# net device ()
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:15:5d:ee:4d:03", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# net device ()
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:15:5d:ee:4d:04", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
记录下，eth1网卡的mac地址00:15:5d:ee:4d:04
接下来，打开/etc/sysconfig/network-scripts/ifcfg-eth0
vi /etc/sysconfig/network-scripts/ifcfg-eth0
将 DEVICE="eth0" 改成 DEVICE="eth1" ,
将 HWADDR="00:15:5d:ee:4d:03" 改成上面的mac地址 HWADDR="00:15:5d:ee:4d:04"
最后，重启网络
service network restart
