I updated Rails and Ruby:
$ ruby -v ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-darwin14.0] $ rails -v Rails 4.1.8 Now when I execute rails server I get this:
$ rails server Usage: rails new APP_PATH [options] Options: -r, [--ruby=PATH] # Path to the Ruby binary of your choice # Default: /Users/guilherme/.rbenv/versions/2.1.5/bin/ruby -m, [--template=TEMPLATE] # Path to some application template (can be a filesystem path or URL) [--skip-gemfile], [--no-skip-gemfile] # Don't create a Gemfile -B, [--skip-bundle], [--no-skip-bundle] # Don't run bundle install { ... } What I have to do to start Rails?