How to set Static IP in Linux

Setting Up A Static IP Address Using The Command Line

Log on as root, change directory to /etc/sysconfig/networking/devices and list all available devices.

# cd /etc/sysconfig/networking/devices

# ls

Find the configuration file corresponding to the NIC for which you want to set a static IP and edit it.

# nano ifcfg-eth0

I prefer using “nano†as a text editor rather than “viâ€.

Now set the parameters below according to your settings (those in bold characters only):

DEVICE=eth0

BOOTPROTO=none

HWADDR=00:0C:29:DE:94:8B

ONBOOT=yes

TYPE=Ethernet

USERCTL=no

IPV6INIT=no

PEERDNS=yes

NETMASK=255.255.255.0

IPADDR=192.168.0.100

GATEWAY=192.168.0.1

Save the configuration file and exit the text editor.

To set the nameservers, change directory to /etc and edit resolv.conf.

# cd /etc

# nano resolv.conf

The file format should be like this:

search your-dns-search-path

nameserver dns1-ip-address

nameserver dns2-ip-address

nameserver dns3-ip-address

Now save the configuration file and exit the text editor. To apply changes, we need to bring the network interface down and back up.

# ifdown eth0

# ifup eth0

If you intend to do that remotely, reboot the server instead as you would be disconnected from your server after issuing the “ifdown†command.