First you need add Daemons in your 'Gemfile'.
gem 'daemons'
Then run bundle
to install Daemons gem. After you can run:
clockworkd -c YOUR_FILE.rb status
clockworkd -c YOUR_FILE.rb start
clockworkd -c YOUR_FILE.rb stop
Or:
bundle exec clockworkd -c YOUR_FILE.rb status
bundle exec clockworkd -c YOUR_FILE.rb start
bundle exec clockworkd -c YOUR_FILE.rb stop