Network Settings in CentOs & Redhat

Set static IP Address to the Server

[root@dlp ~]# 

vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=00:50:43:00:3B:AE

# change

ONBOOT=

yes

# add lines as follows

BOOTPROTO=none

# this server's IP address

IPADDR=10.0.0.30

# subnet mask

NETMASK=255.255.255.0
TYPE=Ethernet

# default gateway

GATEWAY=10.0.0.1

# DNS server's IP address

DNS1=10.0.0.10
IPV6INIT=no
USERCTL=no

[root@dlp ~]#service network restart

for restarting network service it is showing all ok 

[root@dlp ~]#ifconfig

it is showing your IP Address