#contents *Install&Setup [#y05d363e] :Step.1| Check if the rails has already been installed. $ rails --version :Step.2| If the rails has not been installed yet, execute the following command $ gem install rails *HowToUse [#p499ff68] :Step.1| Create new application. $ rails new <Application Name> :Step.2| Launch application. $ cd <Application Name> $ rails server In case you encounter the error message of "Could not find a JavaScript runtime.", execute the following commands. $ gem install execjs $ gem install therubyracer Open the Gemfile and append the following lines. $ vi Gemfile gem ‘execjs’ gem ‘therubyracer’ $ bundle install :Step.3| Access the following page. http://localhost:3000/ #ref(CreateApplication_fig1.png,,500x266,) :Step.4| Create controller and view files. $ rails generate controller <Controller Name> <Method(View)> <Method(View)> (Example) $ rails generate controller Say hello goodbye :Step.5| Access the following page. http://localhost:3000/say/hello/ #ref(CreateApplication_fig2.png,,500x266,) *Contributer [#la69134c] S.Yatsuzuka