Tiger comes with CUPS installed so:
  1. Enable printer sharing in the System Preferences/Printer Setup tool on the Mac
  2. At the Mac terminal (Applications/Utilities in Finder) issue the command lpq localhost which will list the name of your CUPS printer queues
  3. On your Linux system use the printer administration utility to connect to the printer as http://<Mac_IP_Address>:631/printers/<cupsQueueName>, e.g. http://192.168.0.2:631/printers/DESKJET_640C
Updated April 2008 On some clients the URL's seem to be case sensitive so enter them carefully.