I was running through the most excellent Ruby on Rails Tutorial 7th Ed. (by Michael Hartl) and wanted to launch the development web server. However, I mis-typed the command. “rails -s” brianvagnini@Brians-Mac-mini-2 sample_app % rails -s Running 2 tests in a single process (parallelization threshold is 50) Run options: –seed 49801 # Running: .. Finished… Continue reading “rails -s” vs. “rails s”