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My problem is that I ruined my network driver or something like that . I simply sudo vi /etc/network/interfaces and edit the file like

auto eth0
iface eth0 inet static

I didn't change netmask and broadcast.

After that I issued the command sudo /etc/init.d/networking restart.

Then Ubuntu crashed. It didn't show a thing only a terminal that's not responding. I restarted the system and there wasn't a sign that he could possibly connect to the Internet. Please help me. How I can make my Ubuntu 12.10 HP laptop and make the IP address a static IP address?

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Please, can you specify what kind of Ubuntu distribution you are using. – martin-mystere Dec 14 '12 at 8:23
@martin I installed ubuntu 12.10 and didn't change much or istn't that not what you're meaning – TimbooXD Dec 14 '12 at 15:27

The default content of /etc/network/interfaces is

auto lo
iface lo inet loopback

If you removed those lines I imagine the lack of a loopback network might well do bad things to linux.

You can configure a static IP using the NetworkManager GUI (Network Icon->Network Settings->(Connection)->IPv4 Settings). If you want to do it manually, the syntax you describe appears correct (see man interfaces for more details).

Typically on a small network it is easier to set up a static IP by leaving the computer to use DHCP and configuring the router to assign a specific IP address based on the computer's MAC address (which the router will probably tell you, and if not can be found with ifconfig ("HWaddr") or lshw -c network ("serial")).

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