$ bundle exec rails s => Booting WEBrick => Rails 4.2.0 application starting in development on http://localhost:3000 => Run `rails server -h` for more startup options => Ctrl-C to shutdown server [2015-03-19 10:01:40] INFO WEBrick 1.3.1 [2015-03-19 10:01:40] INFO ruby 2.2.0 (2014-12-25) [x86_64-linux] [2015-03-19 10:01:40] INFO WEBrick::HTTPServer#start: pid=3487 port=3000 上記の3行目に, Rails 4.2.0 app