Installing RVM (Ruby Version Manager).

gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3

\curl -L https://get.rvm.io | bash -s stable

source ~/.rvm/scripts/rvm

rvm requirements

Install the basics for the RVM build:

sudo aptitude install libreadline6-dev libyaml-dev sqlite3 libgdbm-dev libncurses5-dev bison pkg-config libffi-dev

Uninstall RVM completely:

rvm implode

After doing that also check for RVM references in .bashrc, .bash_profile and  .profile and remove or comment them out as needed.

Sundry RVM items.

Install Ruby via RVM:

rvm install ruby-2.2.0

Reinstall Ruby via RVM:

rvm reinstall ruby-2.2.0

Set the default Ruby version to use:

rvm --default use 2.2.0

Reload Ruby via RVM:

rvm reload

Get Ruby info via RVM:

rvm info

Upgrade RVM to the latest, stable version:

rvm get stable

Check the installed version of RVM:

rvm -v

List Ruby versions available to RVM:

rvm list

Install the latest version of Ruby GEMs:

rvm rubygems latest

Install the latest version of Bundler:

gem install bundler