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I'm setting up an old computer with ubuntu server 12.04. I wiped the drive and went through the installation fine but afterwards the ethernet would not work. It's physically connected to the router and the card is recognized by lspci(SiS 900) but it won't connect at all. I've plugged in and installed the drivers for a wifi adapter and it's worked with the same router. Just so you know I've turned it on and off plenty of times. Any help would be appreciated.

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if you can see the line starts from eth0 or something similar

then type

dhclient eth0.



to check internet connection.

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ifconfig gives me an eth0 and my loopback address. When I dhclient eth0 it hangs for long time but then goes to the prompt with no error. When I ping google it says "unknown host" – smithy545 Nov 11 '12 at 7:03
can you post the output of route -n ? – linuxk Nov 11 '12 at 8:16
It says(I added "line break" and the o's for simplicity as comment formatting is difficult): ooooooo Kernel IP routing table line break oooooooooooooooooooooooooooooooooooooooooo Destination Gateway Genmask Flags Metric Ref Use Iface line break oooooooooooooooooo UG 100 0 0 eth0 line break oooooooooooooooooooooooooo U 0 0 0 eth0 – smithy545 Nov 11 '12 at 17:55
Here's it without the o's for easy copying.Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface UG 100 0 0 eth0 U 0 0 0 eth0 – smithy545 Nov 11 '12 at 17:56
Thank you so much for your help but I got a new nic card and all is now good. I appreciate your help and I marked your answer right to give you points. – smithy545 Nov 12 '12 at 21:47

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