配置centos的静态ip 以及网关 Configure Static IP Address in CentOS

转载地址：http://www.mustbegeek.com/configure-static-ip-address-in-centos/

The following steps will show configuration of static IP address in CentOS machine.

Files needed for network configuration are under
/etc/sysconfig/network-scripts. So open the file with editor like
nano or vi. Here I will use nano editor. After you start your server runningCentOS enter root user credentials and get in. Type the command,
# nano /etc/sysconfig/network-scripts/ifcfg-eth0

You will see default configuration like this,



Now change the configuration to this,


Then save the file, to save press ctrl+x to exit and pressy for confirmation.
Now restart the network services by issuing the command,
[root@hostname~]# service network restart


To verify the IP address issue the following command,
[b][root@hostname~]# ifconfig
[/b]You will then see following information,


After configuring IP address now let’s configure DNS. Name server or DNS information is stored in different file. The location is,/etc/recolv.conf. Again using nano editor to configure DNS information,
[root@hostname~]# nano /etc/resolv.conf

By default, this file is empty, so enter at least one entry here,
nameserver 4.2.2.2
The name server IP address can be different depending on your network scenario. I will use www.google.com. Now save the file and exit. You can test the configuration by issuing ping command.

[root@hostname~]# ping www.google.com
If you get the reply, you have successfully configured the IP address and DNS information.