[ubuntu] errors trying to install ubuntu-desktop on 12.04.1 LTS server

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http://ubuntuforums.org – I am running 12.04.1 LTS server, and I am trying to install a GUI (any will do - I mostly use the command line, but occationally a GUI is useful). I did: apt-get update apt-get install ubuntu-desktop I get the following error: E: Unable to locate package ubuntu-desktop apt and internet access ARE working (IE: I can run "apt-get update" and "apt-get upgrade") I am using the default /etc/apt/source.list, and I believe that "main restricted", "precise universe", "precise multiverse", etc are all enabled. Any help would be greatly appreciated (Hardware)