Small guide for Redmine installation on CentOS 5.3. Requirements: Ruby 1.8.7 RubyGems MySQL 4.1 or higher (recommended) openssl + openssl-devel zlib + zlib-devel Lets install all required packages before compiling ruby. First of all, lets add rpmforge repository to your default CentOS installation: rpm –import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt rpm -ihv http://dag.wieers.com/r