• Our Cloud9 virtual computer comes preinstalled with RVM, a program that helps us manage exactly which version of Ruby and Rails we'll use.
• Ensuring you have the same version of Ruby and Rails as the videos is key to making sure your app behaves exactly like the app in this course.

###Terminal

cd
cd workspace
rvm install 2.3.0
rvm --default use 2.3.0
rvm gemset list
rvm gemset create saasapp
rvm gemset list
rails -v
rvm --default use ruby-2.3.0@saasapp
gem install rails -v 5.0.0 --no-ri --no-rdoc
ruby -v
rails -v
rvm --default use ruby-2.3.0@saasapp
rails new saasapp
cd saasapp
touch .rvmrc
c9 .rvmrc

###.rvmrc

rvm use 2.3.0@saasapp

###Terminal

cd ..
cd saasapp
y
rvm rvmrc to .ruby-version
rm .rvmrc