title: How do I create a cron job that will run everyday at 12:20am?
body: <p>I am trying to write a cron job on my Mac OS X machine that will run a Ruby script at 12:20am everyday.</p>
  
  <p>This is what I need to run but I don't know the syntax or the command to use on the Mac:</p>
  
  <pre><code>/usr/bin/ruby /Users/tamer/scripts/sftp.rb
  </code></pre>
  
  <p>I read about doing <code>crontab -e</code> but do I need to do something afterwards?</p>