LAN connection not working

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http://ubuntuforums.org – Hello all! I just installed ubuntu for the first time on an old desktop (at the suggestion of a good friend). The installation went well, but it didn't seem to detect my wired internet connection. This desktop has no wireless card currently, so wired had been my only option. I have tested the wired connection on a Windows 7 laptop and it works fine. Is there any way to get this to work?? -Zach (Hardware)