"One example of its use would be to have a FreeNX
server set up on your home computer, and graphically logging in to
the home computer from your work computer, using a FreeNX client.
"Installing the FreeNX server in Ubuntu 8.10 You need to add the
following source list to your /etc/apt/sources.list file:
sudo gedit /etc/apt/sources.list
deb http://ppa.launchpad.net/marceloshima/ubuntu intrepid main
deb-src http://ppa.launchpad.net/marceloshima/ubuntu intrepid
main
deb http://ppa.launchpad.net/freenx-team/ubuntu intrepid main
deb-src http://ppa.launchpad.net/freenx-team/ubuntu intrepid
main"