title: Jenkins cron format
body: <p>In Jenkins we have the Poll SCM schedule set to <code>* * * * *</code>.  But Jenkins suggests <code>Do you really mean "every minute" when you say "* * * * *"? Perhaps you meant "0 * * * *"</code></p>
  
  <p>Is there any difference between <code>* * * * *</code> and <code>0 * * * *</code> ?</p>