Using medibuntu Repository Add gpg key using the following command wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add - Edit sources.list with new repo data sudo wget http://medibuntu.sos-sts.com/sources.list.d/feisty.list -O /etc/apt/sources.list.d/medibuntu.list Update the source list using the following command sudo apt-get update Install acrobat reader with firefox plugin in Ubuntu sudo apt-get install acroread mozilla-acroread acroread-plugins