Unable to install rubygems on ubuntu

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http://askubuntu.com – When i try to execute sudo apt-get install rubygems i get the following response Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: linux-headers-3.2.0-30 linux-headers-3.2.0-30-generic Use 'apt-get autoremove' to remove them. The following extra packages will be installed: build-essential dpkg-dev fakeroot g++ g++-4.6 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libdpkg-perl libreadline5 libruby1.8 libstdc++6-4.6-dev ruby1.8 ruby1.8-de (HowTos)