# Installation - Install Ruby - Install Rubygems - Install Bundler: gem install bundler - Install the application $ bundle # Run Start the app: $ rackup Then open a browser to: http://localhost:9292 If you want it to auto-reload your app when files change, use Shotgun: $ gem install shotgun $ shotgun myapp.rb http://stackoverflow.com/questions/1247125/how-to-get-sinatra-to-auto-reload-the-file-after-each-change