RVM is an environment manager for Ruby. With RVM you can handle different versions of Ruby and different gemsets on the same machine. With this command you can install the tool on your machine. bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer) source ~/.bash_profile If you want to install a special ruby version on your machine,Continue reading “RVM”