Ruby on Rails, or simply Rails, is an open source web application framework built on top of the Ruby programming language. In this article, we will show you how to install Ruby, Ruby on Rails and Nginx with Passenger support on Debian-based distributions (Ubuntu VPS and Debian VPS).
Ruby is an object-oriented programming language that is similar in syntax to Perl and Python. The version of Ruby that ships with CentOS 6.2 is 1.8.7. If you need the latest version, you can download, compile and install Ruby from source code. This is a quick tutorial on installing Ruby 1.9.3 and Rubygems 1.8.24 on CentOS 6.2 from source.