創建的KVM虛擬機實例，網絡無法啟動。嘗試：
service network restart 提示：
device "eth0" does not seem to be present, delaying initialization
查看網絡設備：
ls /etc/sysconfig/network-scripts/ifcfg*
/etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-lo
ifconfig -a 查看：
eth1 Link encap:Ethernet HWaddr FA:16:3E:32:79:88
inet6 addr: fe80::f816:3eff:fe32:7988/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:159 errors:0 dropped:0 overruns:0 frame:0
TX packets:85 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:17826 (17.4 KiB) TX bytes:12487 (12.1 KiB)
Interrupt:10 Base address:0xa000
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:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
可以看出是網卡配置異常，記錄下eth1的mac地址，修改/etc/sysconfig/network-scripts/ifcfg-eth0 為：
DEVICE="eth1"
BOOTPROTO="dhcp"
HWADDR="FA:16:3E:32:79:88"
NM_CONTROLLED="yes"
ONBOOT="yes"
改名：
mv /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth1
再重啟網絡服務：
service network restart
網絡正常了！
