centos配置网卡修改ip地址和修改网关的方法
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>一、CentOS 修改IP地址</p>
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修改对应网卡的IP地址的配置文件<br>
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<span><u>复制代码</u></span>
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<p>
代码如下:</p>
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# vi /etc/sysconfig/network-scripts/ifcfg-eth0</div>
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修改以下内容<br>
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<span><u>复制代码</u></span>
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<p>
代码如下:</p>
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DEVICE=eth0 #描述网卡对应的设备别名，例如ifcfg-eth0的文件中它为eth0<br>
BOOTPROTO=static #设置网卡获得ip地址的方式，可能的选项为static，dhcp或bootp，分别对应静态指定的 ip地址，通过dhcp协议获得的ip地址，通过bootp协议获得的ip地址<br>
BROADCAST=192.168.0.255 #对应的子网广播地址<br>
HWADDR=00:07:E9:05:E8:B4 #对应的网卡物理地址<br>
IPADDR=12.168.1.2 #如果设置网卡获得 ip地址的方式为静态指定，此字段就指定了网卡对应的ip地址<br>
IPV6INIT=no<br>
IPV6_AUTOCONF=no<br>
NETMASK=255.255.255.0 #网卡对应的网络掩码<br>
NETWORK=192.168.1.0 #网卡对应的网络地址<br>
ONBOOT=yes #系统启动时是否设置此网络接口，设置为yes时，系统启动时激活此设备</div>
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二、CentOS 修改网关<br>
修改对应网卡的网关的配置文件<br>
</p>
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<span><u>复制代码</u></span>
</div>
<p>
代码如下:</p>
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# vi /etc/sysconfig/network</div>
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修改以下内容<br>
NETWORKING=yes(表示系统是否使用网络，一般设置为yes。如果设为no，则不能使用网络，而且很多系统服务程序将无法启动)<br>
HOSTNAME=centos(设置本机的主机名，这里设置的主机名要和/etc/hosts中设置的主机名对应)<br>
GATEWAY=192.168.1.1(设置本机连接的网关的IP地址。例如，网关为10.0.0.2)</p>
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三、CentOS 修改DNS</p>
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修改对应网卡的DNS的配置文件<br>
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<span><u>复制代码</u></span>
</div>
<p>
代码如下:</p>
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# vi /etc/resolv.conf</div>
<p>
<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>修改以下内容</span></p>
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<span><u>复制代码</u></span>
</div>
<p>
代码如下:</p>
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nameserver 8.8.8.8 #google域名服务器<br>
nameserver 8.8.4.4 #google域名服务器</div>
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四、重新启动网络配置</p>
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<span><u>复制代码</u></span>
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<p>
代码如下:</p>
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# service network restart</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>或</span></p>
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<span><u>复制代码</u></span>
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<p>
代码如下:</p>
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# /etc/init.d/network restart</div>
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修改 IP 地址<br>
即时生效:<br>
# ifconfig eth0 192.168.0.2 netmask 255.255.255.0<br>
启动生效:<br>
修改 /etc/sysconfig/network-scripts/ifcfg-eth0</p>
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修改网关 Default Gateway<br>
即时生效:<br>
# route add default gw 192.168.0.1 dev eth0<br>
启动生效:<br>
修改 /etc/sysconfig/network</p>
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修改 DNS<br>
修改/etc/resolv.conf<br>
修改后可即时生效，启动同样有效</p>
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修改 host name<br>
即时生效:<br>
</p>
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<span><u>复制代码</u></span>
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<p>
代码如下:</p>
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# hostname centos1</div>
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启动生效:</p>
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修改/etc/sysconfig/network</p>
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修改网卡配置<br>
</p>
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<span><u>复制代码</u></span>
</div>
<p>
代码如下:</p>
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#vi /etc/udev/rules.d/70-persistent-net.rules</div>
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