Booting System Without Full Network Configuration (SOLVED!)

Case :

I was trying to solve internet problems, and seem to have made things worse: Now when I start the computer it gets stuck on "Booting system without full network configuration".

Does anyone know how to make it unstuck?

Alternatively: It got messed up when I changed the contents of /etc/network/interfaces, so presumably would work again if I changed it back. How can I edit this file during boot?

I'm using Ubuntu 12.10.

Solved :

After you see "Booting system without full network configuration" press Ctrl +Alt + F1.
You must login with your credential. input your username and password.

It should get you to the shell prompt. Use a shell text editor to change /etc/network/interfaces.

The default contents of the /etc/network/interfaces file look something like this:

# The loopback network interface

auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp 

Press  Ctrl X  and Y to save changes and exit nano after you've done with it.

If you have finished, please restart system with "reboot"

and then....

Your Linux Ubuntu come back to normal again :D