Ruby

Installation and rvm

On mac http://code.tutsplus.com/tutorials/how-to-install-ruby-on-a-mac--net-21664

On ubuntu
https://help.ubuntu.com/community/RubyOnRails#Configure_Apache

• Ruby version manager rvm
  https://rvm.io/rvm/install Make it more easy to have different version of ruby

• Install rvm and latest ruby stable version
  \curl -L https://get.rvm.io | bash -s stable --ruby

@todo To be clarified, don't work for me

To use rvm

source /usr/local/rvm/scripts/rvm

To use the more recent version with rvm

rvm use

• Use Gem