rails generate
or rails g
替代了 script/generate
rails server or rails s
替代了 script/server
rails 2 ->3路由变化:map.connect '/ads/:id', :controller=>'ads', action=>'show'变更为match '/ads/:id' => 'ads#show',:via => :get 或者 get '/ads/:id' => 'ads#show' ,同时使用resource :ads同样效果