A few weeks or so ago, I was learning Ruby on Rails and I couldn’t avoid running into the version control issue with Ruby. Consider a situation where you are running Ruby 1.93 but you want to write code that works with a different version of Ruby like Ruby 2.00. The solution is to perhaps install more than one version right? Now after installing more than one version, you might be wondering how to switch from one version to another. That is why I am doing this tutorial.