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Today I installed Ubuntu Server 12.04.2 LTS i386 version on my old AMD Athlon 2000+ PC... The thing is I don't have access to internet. I cant even execute sudo apt-get update... An I cant ping

During installation I put the local IP, Subnet, nameserver from my ISP and I left PROXY empty and I jut pressed enter after the proxy. Now I don't have any acces to internet from server and I can't update my machine...

Is it because I didn't put any PROXY address???

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Are you bihind a proxy? Can you provide info about the internet connection. – mikewhatever Mar 9 '13 at 11:50
As above, please edit the question to include information about your networking hardware (lspci -nn | grep net) and let us know how your network is configured. I suspect you've set a static IP and your router wants to give you a dynamic IP. – Oli Mar 9 '13 at 11:53
00:0d.0 Ethernet controller [0200]: Realtek Semiconductor RTL-8139 (rev 10) – tehnikalac Mar 9 '13 at 11:57
00:13.0 Ethernet controller [0200]: Realtek Semiconductor RTL-8139 (rev 10) – tehnikalac Mar 9 '13 at 11:58
I logged into my router and configured manually that my DHCP always gives me IP for my server. Even during installation I set IP for server – tehnikalac Mar 9 '13 at 11:59

1 Answer 1

Per my comment above, it sounds like you've configured something you should have left as automatic. I would run sudoedit /etc/network/interfaces and make the file look something like this:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

Save that and run sudo /etc/init.d/networking restart or sudo restart networking (I can't remember if 12.04 is Upstart-converted). Assumign the ethernet device is supported, that should tell it to ask for a dynamic IP.

If you want to statically assign an IP (often a desirable thing for a server) I would get the DHCP server on the router to set your server's IP to the same thing each time. Most routers allow this sort of soft-static addressing by MAC address.

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I ran sudoedit /etc/network/interfaces and this is what my data says:sudoedit /etc/network/interfacesnet static address netmask network broadcast gateway #dns-* options are implemented by the resolvconf package, if installed dns-nameservers dns-search auto eth0 iface eth0 i – tehnikalac Mar 9 '13 at 12:01
I assigned IP for server na router manually: – tehnikalac Mar 9 '13 at 12:07
Now when I ping it says Destionation Host Unreachable – tehnikalac Mar 9 '13 at 12:08
Now I cant see my server on router – tehnikalac Mar 9 '13 at 12:10

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