Ruby is a very popular programming language that has Ruby on Rails, or RoR, is a popular development framework that allows you to easily get your application up and running with minimal hassle. Developing applications often times requires that you emulate different environments. Different versions of Ruby may be necessary for different projects. With conventional installations, this would impede your ability to be flexible. Luckily, the Ruby Version Manager, known more widely as RVM, allows you to easily install multiple, contained versions of Ruby and easily switch between them.
Ruby on Rails is one of the most popular application stacks for developers wishing to create sites and web apps. The Ruby programming language, coupled with the Rails development framework, makes app development simple. Since Ruby on Rails doesn’t come in a neatly packaged format, getting the framework installed used to be one of the more difficult parts of getting started. Luckily, tools like rvm, the Ruby Version Manager, have made installation simple.