How to set a static IP in Ubuntu from the shell

Just a quick one this morning. Below are simple instructions on how to set a static IP on Ubuntu from the shell. I am sure the instructions can be used on any Debian based system.

Open interfaces with your favourite editor

sudo vi /etc/network/interfaces

Modify the lines under #The primary network interface to match your requirements. In this example I use

# 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

# The primary network interface
auto eth0
iface eth0 inet static

Save the file -and reboot the system, the changes will be applied.- EDIT: (01/08/2011 @ 9:11 PM) You never need to reboot, in the above example, after you save you can do the following to apply the changes (courtesy of Mat)

$ sudo /etc/init.d/networking restart

Bonus Points (A.K.A Tips)

If you’re only making a temporary change to eth0 (for testing etc..) do (courtesy of Mat)

$ sudo ifconfig eth0 netmask


01 Aug 2011