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Download Ruby Enterprise Edition

100% open source

All operating systems

Step 1: Download

Source code: version 1.8.6-20080810

Step 2: Install

Extract it: 
tar xzvf ruby-enterprise-X.X.X.tar.gz
Run the installer (completely safe, none of your system files will be touched!): 
./ruby-enterprise-X.X.X/installer

Step 3: Tell Phusion Passenger to use Ruby Enterprise Edition instead of regular Ruby

Follow the instructions that the installer gives you.

Ubuntu Linux

Step 1: Download

Version 1.8.6-20080810 for Ubuntu 8.04

(The Ruby interpreter will be available as /opt/ruby-enterprise/bin/ruby)

Step 2: Tell Phusion Passenger to use Ruby Enterprise Edition instead of regular Ruby

Open your Apache configuration file, and change the PassengerRuby configuration option to the following: 
PassengerRuby /opt/ruby-enterprise/bin/ruby

* Except Microsoft® Windows.