http://www.khattam.info/2009/08/20/howto-installing-adobe-reader-9-to-ubuntu-9-10-karmic-koala-alpha-4/

On January 14th, 2010 at 5:51 pm Jukka Says:

1. This is how you can install Acroread to Ubuntu 9.10 64 bit:

   1. Open Synaptic Packet Manager (from System / Administration)

   2. Add Partner Repository (to do this: under Settings choose Repositories, go to inter-leaf Other Software and tick-a-box besides ‘archive.canonical.com/ubuntu karmic partner’, click Close)

   3. Update Repository info (to do this: click Reload button in Synaptic)

   4. Search for Acroread (to do this: click Search button in Synaptic)

   5. Install as usual (to do this: right click the tick-a-box besides Acroread package and choose ‘Mark for Installation’ and then click Apply)

   6. When done close Synaptic.

   That’s it. Nothing else to it.