Versions

• OS: Redhat Enterprice Linux 5.4

Directory and File

• Directory: /etc/sysconfig/network-scripts/
• File: ifcfg-eth0

Modify in blue & Add in red 

DEVICE=eth0

BOOTPROTO=static

IPADDR=192.168.1.10

NETMASK=255.255.255.0

GATEWAY=192.168.1.254

HWADDR=[no need to modify]

ONBOOT=yes

Take Effect 

[root@A cluster]# ifdown eth0

[root@A cluster]# ifup eth0

[root@A cluster]# /etc/init.d/network restart

Quick Guide

[root@A cluster]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

• [modify [ifcfg-eth0]'s content]

[root@A cluster]# ifdown eth0

[root@A cluster]# ifup eth0

[root@A cluster]# /etc/init.d/network restart