Ruby Ubuntu installation instructions.

install.sh

sudo apt-get install ruby1.9.1 ruby1.9.1-dev \
  rubygems1.9.1 irb1.9.1 ri1.9.1 rdoc1.9.1 \
  build-essential

#install sqlite3

sudo apt-get install libsqlite3-dev

#to test if the installation process went smoothly 
#type the following commadn

ruby -v

#would display ruby version 1.9.3

sudo gem install rails 

# would install rails, this process will take some time so better have it all install in every systems

# we require node.js as we are using rails uses coffee script so install nodejs

sudo apt-get install node.js