Setting static IP address on Red Hat

RHEL / Red hat / Fedora / CentOS Linux Static IP Configuration

For static IP config you need to edit the following files using a text editor such as vi. I have a post with some simple vi commands to help you achieve this.

#cd  /etc/sysconfig/

Sample of my config 


# cat /etc/sysconfig/network



NETWORKING=yes
HOSTNAME=cucm.pub
GATEWAY=192.168.1.1

Edit /etc/sysconfig/network-scripts/ifcfg-eth1

Sample of my config

DEVICE=eth1
BOOTPROTO=static
DHCPCLASS=
HWADDR=00:**:**:**:**:**
IPADDR=192.168.1.50
NETMASK=255.255.255.0
ONBOOT=yes

Then make sure you have your DNS services in /etc/resolv.conf
 # cat /etc/resolv.conf
 Sample of my config

 
search home.local
nameserver 8.8.4.4
nameserver 8.8.8.8


Now restart the service like this


# /etc/init.d/network restart


and finally test like this:


# ifconfig eth1
# route -n
# ping 192.168.1.1
# ping google.com
 

Unbuntu \ Debian 
open with gedit or any other editor you feel comfortable with  /etc/network/interfaces

sudo gedit /etc/network/interfaceIf you are using DHCP, you will see the following lines

     auto eth0

iface eth0 inet dhcp

Now change the settings as below

auto eth0

iface eth0 inet static

address 192.168.1.5

netmask 255.255.255.0

network 192.168.1.0

broadcast 192.168.1.255

gateway 192.168.1.1

Restart the neworking service using the following command

sudo /etc/init.d/networking restart

or service /networking restart