[ Thanks to Falko
Timme for this link. ]
“5 Configure Additional Repositories
“Some packages like the Adobe Reader are not available in the
standard Ubuntu repositories. The easiest way to make such packages
available to your system is to add the Medibuntu repository.“First we open a terminal (Accessories > Terminal):
First off, we edit /etc/apt/sources.list…“sudo gedit /etc/apt/sources.list
“… and enable the intrepid partner repository (because some
packages such as Opera are available only in that repository):”