Adding medibuntu repository

In order to add the Medibuntu repository you have to download the following list using this command

$sudo wget http://www.medibuntu.org/sources.list.d/hardy.list -O /etc/apt/sources.list.d/medibuntu.list

Then you have to run the following command in order to add the Medibuntu GPG key:

$sudo apt-get update && sudo apt-get install medibuntu-keyring && sudo apt-get update

And finally you can get acroread:

$sudo apt-get install acroread