Development

1. Install Ruby
2. Install DevKit (http://rubyinstaller.org/downloads/)
3. gem install capistrano --no-ri --no-rdoc

Deployment Machine

1. Update the software sources list
2. And upgrade the dated applications:

   aptitude    update
   aptitude -y upgrade
   

3. Download and install the build-essential package:

   aptitude install -y build-essential

4. And some additional, commonly used tools:

   aptitude install -y cvs subversion git-core libyaml-dev mercurial

5. Get the Ruby Version Manager
   Before installing RVM, you need to import the RVM GPG Key:
   

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

6. Then install RVM to manage our Rubies:
   

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

7. And to create a system environment with RVM:
   source /etc/profile.d/rvm.sh
8. Download and install Ruby using RVM:
   

   rvm reload
   rvm install 2.2.1 ( or latest version)