We had recently been involved in a project to set up a Conference Management System for an International Conference to be conducted in Kerala sometime later this year. We had zeroed in on Pentabarf as the solution we were going to base the system on. Pentabarf is a Ruby on Rails solution that has been used for the last couple of DebConfs. Pentabarf as such is an excellent system, being a system created by programmers for programmers, but it heavily lacked in documentation both on their site and on the world wide web. We however managed to get it installed on Ubuntu with Apache, Ruby on Rails and FastCGI. We are sharing the installation instructions for Pentabarf on Ubuntu here