RVM Switching Ruby versions

RVM is the acronym for Ruby version Manager and is a command-line tool that allows you to easily install, manage, and use multiple versions of Ruby. Different rails projects use RVM to switch freely when using the same version of Ruby and Rails.

Installing RVM

Install RVM (development version)-Installing Ruby development

\curl -sSLhttps://get.rvm.io | bash

Install RVM stable with ruby-stable version with Ruby:

\curl -sSLhttps://get--ruby

View Ruby version

list

You will see the following output:

rvm rubies   ruby-2.2.0 [ x86_64 ]=* ruby-2.2.1 [ x86_64 ]   ruby-2.2.3 [ x86_64 ]# => - current# =* - current && default#  * - default

View current Ruby version

rvm current

Switch Ruby version

Now 2.2.1 is the ruby version being used, if you want to switch to 2.2.2:

rvm --defaultuse2.2.2

If the 2.2.2 version is not installed, the command will be prompted ruby-2.2.2 is not installed.
to install:

install ruby-2.2.2

RVM Switching Ruby versions