wc

$ wc -l **/*.rb | sort -r | head -10
  7104 total
     720 models/question.rb
     468 controllers/god_controller.rb
     407 controllers/analytics_controller.rb
     382 controllers/admin/god_controller.rb
     258 models/user.rb
     252 controllers/mobile/api_controller.rb
     167 controllers/admin/foo_controller.rb
     140 models/quux.rb
     128 controllers/bar_controller.rb