How to configure Static IP Address in linux RHEL/ CentOS 5/6

To configure network setup in produciton server you need valid ip address, Subnet mask, Gateway address and DNS IP .

Server Information

Operating System: Centos - 5.4

IP Address: 192.168.1.5

Subnet mask: 255.255.255.0

Gateway IP: 192.168.1.1

DNS IP: 8.8.8.8

Network Configuration file: /etc/sysconfig/network-script/ifcfg-eth0

DNS configuration file: /etc/resolv.conf

Edit file to setup network configuration

# vim /etc/sysconfig/network-scripts/ifcfg-eth0

Syntax:

DEVICE=eth0

TYPE=Ethernet

ONBOOT=yes

BOOTPROTO=static

IPADDR=192.168.1.5

NETMASK=255.255.255.0

Edit File to setup Gateway IP Address in specific file

# vim /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=vncserver.shahzad

GATEWAY=192.168.1.1

Restart networking service

# service network restart

Permanently on Network service on startup

# chkconfig network on

Now configure DNS

# vim /etc/resolv.conf

Nameserver 8.8.8.8

Test configuraiton

# ping 192.168.1.1   ( Ping your gateway ip address)

# ping 8.8.8.8

#ping google.com    

Both gateway and DNS ip address should ping. If both address is pinging then you have setup networking successfully. 

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About Penguin Technology

I am a passionate cloud and DevOps professional specializing in Linux and open-source solutions. Through this blog, I share my knowledge and experience with the community, offering tips and insights on cloud technologies and DevOps practices.