Howtoforge posted a guide about installing Liferay 6.0.5 Community Edition with Tomcat on Ubuntu 10.04

Liferay Portal is an enterprise web platform for building business solutions that deliver immediate results and long-term value. Get the benefits of packaged applications and an enterprise application framework in a single solution.

  Installing Liferay 6.0.5 Community Edition Bundled With Tomcat On Ubuntu 10.04