How to Setup Static IP Address in Ubuntu Linux from command line

This is for system Administrators and power Users

How can you Setup a Static IP Address from command Line.
This is applicable for Debian / Ubuntu and Its Clones

First You have to remove Network Manager .

Then edit the file /etc/network/interfaces with admin privilege

$ gksu gedit  /etc/network/interfaces

add the Ip as per  your needs ( example I am Going to setup  IP address 192.168.0.5):

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

# The loopback network interface

auto lo

iface lo inet loopback

# This is a list of hotpluggable network interfaces.

# They will be activated automatically by the hotplug subsystem.

mapping hotplug

script grep

map eth0

# The primary network interface

auto eth0

iface eth0 inet static

address 192.168.0.5

netmask 255.255.255.0

network 192.168.0.0

broadcast 192.168.0.255

gateway 192.168.0.1