VMware新克隆的虚拟机CentOS6.6网卡无法启动问题
VMware新克隆的虚拟机CentOS6.6网卡无法启动问题虚拟机版本：VMware workstations 11
系统版本：CentOS6.6-2.6.32-504.el6.x86_64
问题描述：
通过VMware workstations 11 的完全克隆功能快速创建一台版本为CentOS6.6的Linux虚拟机，创建后，
1）启动用ifconfig，发现无只有回环地址127.0.0.1；
2）Mac地址及主机名都与源主机相同；
3）service network restart 启动网络服务失败；
解决方法：
1.将配置文件70-persistent-net.rules备份，然后清空配置文件
# cd/etc/udev/rules.d/
# cp70-persistent-net.rules 70-persistent-net.rules.bak
#>70-persistent-net.rules
2.将克隆过来的的配置文件ifcfg-eth2备份，然后更改配置文件；删除HWADDR和UUID那两行，更改网卡名字为eth0
# cd/etc/sysconfig/network-scripts/
# cpifcfg-eth2 ifcfg-eth2.bak
# mvifcfg-eth2 ifcfg-eth0
# catifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=dhcp
3.reboot重启主机.
注意：这里一定是重启主机，而不是重启服务；
清空70-persistent-net.rules后，重启主机，系统会自动获取网卡信息，如下：
# cat/etc/udev/rules.d/70-persistent-net.rules
# PCI device 0x8086:0x100f (e1000)
SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*",ATTR{address}=="00:0c:29:c9:84:1a", ATTR{type}=="1",KERNEL=="eth*", NAME="eth0"
4．验证，查看ip地址信息
# ifconfig
eth0 Link encap:EthernetHWaddr00:0C:29:6C:C9:99
inet addr:192.168.116.137 Bcast:192.168.116.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe6c:c999/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500Metric:1
RX packets:924 errors:0 dropped:0 overruns:0 frame:0
TX packets:163 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:85394 (83.3 KiB)TXbytes:21413 (20.9 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:672 (672.0 b)TXbytes:672 (672.0 b)
能ping通www.baidu.com，也就可以连上CRT了（NAT模式）
# ping www.baidu.com
PING www.a.shifen.com (61.135.169.121)56(84) bytes of data.
64 bytes from 61.135.169.121: icmp_seq=1ttl=128 time=6.67 ms
64 bytes from 61.135.169.121: icmp_seq=2ttl=128 time=4.60 ms
64 bytes from 61.135.169.121: icmp_seq=3ttl=128 time=5.85 ms
^C
--- www.a.shifen.com ping statistics ---
3 packets transmitted, 3 received, 0%packet loss, time 2819ms
rtt min/avg/max/mdev =4.606/5.713/6.678/0.854 ms
备注：若是内网，选择host-only 仅主机模式，同样的配置方法，验证时可以ping通物理机即可连接CRT
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