问题
默认情况下，CentOS 6安装没有网络接入相关配置，需要你对网络接口进行配置。
解决方案
查看缺省接口配置
接口相关配置保存在/etc/sysconfig/network-scripts目录下，下面显示的是缺省的接口配置。
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[root@CentOS65 network-scripts]# more /etc/sysconfig/network-scripts/ifcfg-eth0
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DEVICE=eth0
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HWADDR=00:0C:29:C1:48:03
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TYPE=Ethernet
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UUID=b2bbb718-caa6-46c3-ae12-587cbedfd5fa
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ONBOOT=no
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NM_CONTROLLED=yes
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BOOTPROTO=dhcp
配置接口静态地址
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# vi /etc/sysconfig/network-scripts/ifcfg-eth0
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DEVICE="eth0"
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NM_CONTROLLED="yes"
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ONBOOT=yes
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HWADDR=A4:BA:DB:37:F1:04
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TYPE=Ethernet
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BOOTPROTO=static
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UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
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IPADDR=10.220.33.108
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NETMASK=255.255.255.0
配置网关
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# vi /etc/sysconfig/network
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NETWORKING=yes
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HOSTNAME=centos6
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GATEWAY=10.220.33.1
重启网络接口
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[root@CentOS65 network-scripts]# /etc/rc.d/init.d/network restart
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Shutting down interface eth0: [ OK ]
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Shutting down loopback interface: [ OK ]
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Bringing up loopback interface: [ OK ]
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Bringing up interface eth0: Determining if ip address 10.220.33.108 is already in use for device eth0...
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[ OK ]
配置DNS服务器
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# vi /etc/resolv.conf
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nameserver x.x.x.x # Replace with your nameserver ip
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nameserver y.y.y.y # Replace with your nameserver ip
查看接口配置
使用"ip a"或ifconfig命令可以查看当前接口配置信息
参考资料
1. Centos:Interface configuration files
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