CentOS Linux解决Device eth0 does not seem to be present

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CentOS Linux解决Device eth0 does not seem to be present

今天早上打开xshell链接虚拟机，突然链接不上。然后进入虚拟机执行 ifconfig 或者 ip addr list 命令发现eth0 不见。然后执行重启网卡命令发现

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.
　　# PCI device 0x1022:0x2000 (pcnet32)
　　SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:8f:89:9
　　7", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
　　# PCI device 0x1022:0x2000 (pcnet32)
　　SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:50:bd:1
　　7", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

　　记录下，eth1网卡的mac地址00:0c:29:50:bd:17 　　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="00:0c:29:8f:89:97" 改成上面的mac地址 HWADDR="00:0c:29:50:bd:17"
　　最后，重启网络
　　# service network restart
　　或者
　　# /etc/init.d/network restart

　然后瞬间就满血复活，xshell链接也正常了。