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I've installed ubuntu server on my computer. I would like to connect to the internet to download more software. I've done:

ifconfig eth0 up

so when I print

ifconfig

I can see the eth0 listed, but it doesn't have IP address. I tried to dhclient but that doesn't print anything.

What do I have to do first?

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you have static ip or dynamic? –  user61928 Oct 8 '12 at 12:42
    
Right now, I dont have any. But there is DHCP on the server, where I want to connect. –  tsusanka Oct 8 '12 at 12:44
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1 Answer

up vote 7 down vote accepted

edit the /etc/network/interfaces

sudo vi /etc/network/interfaces

Change the file to look like this

#The primary network interface -- use DHCP to find our address
auto eth0
iface eth0 inet dhcp

then try the following commands:

dhclient -r

/etc/init.d/networking restart
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thx, I am getting, postconf: fatal: open /etc/postfix/main.cf: No such file or directory. Btw there is not some network manager that would care about that? –  tsusanka Oct 8 '12 at 12:56
    
and its deprecated.. –  tsusanka Oct 8 '12 at 12:56
1  
try this sudo dpkg-reconfigure postfix It will fix it –  user61928 Oct 8 '12 at 13:02
    
Now it says (before too, sorry) grep: /etc/resolv.conf: No such file or directory. And it just hangs. Looks like we did some mistakes during install, didn't we? –  tsusanka Oct 8 '12 at 13:09
    
try sudo dpkg-reconfigure resolvconf –  user61928 Oct 8 '12 at 13:18
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