故障描述：
# service network restart 
Shutting down loopback insterface:                                                                                                        [   OK  ] 
Bringing up loopback insterface:                                                                                                             [   OK  ]
Bringing up interface eth0:  Device eth0 does not seem to be present,delaying initialization.  [FAILED] 
解决方法：
1.修改Centos虚拟机克隆机的HWADDR为ifconfig -a的MAC地址

 (或者将 /etc/sysconfig/network-scripts/ifcfg-eth0 文件中的 HWADDR 行用‘#’注释掉)
形如：HWADDR="00:0C:29:90:A7:23" 
2.删除文件后重启 
# rm -rf /etc/udev/rules.d/70-persistent-net.rules 
# reboot 


附 /etc/udev/rules.d/70-persistent-net.rules 文件内容如下：

$ cat /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.


# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:d2:a6:db", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"