Using Static IP Address On Ubuntu

By default most unix boxes now come with dynamic IP enabled for all its networking needs. This is a very useful configuration but at times it helps to know that a system’s IP will remain the same no matter what changes occur around it. A classic example of this case can be a server.

In any case if you want to change your unix box to use static IP the following simple steps will get your task done:

  1. Edit the /etc/network/interfaces file, it can be opened by the command:
    sudo nano /etc/network/interfaces
  2. The contents of the file will read something like:

    auto lo
    iface lo inet loopback

  3. Replace the text with the following text:

    auto eth0
    iface eth0 inet static

  4. Finally we need to restart the networking daemon.  It can be done with the following command:
    sudo /etc/init.d/networking restart