title: What is the syntax for a cron job that runs 15 and 45 minutes after the hour?
body: <p>What is the syntax for a cron job that runs 15 and 45 minutes after the hour? (So every 30 minutes.)</p>
  
  <p>Would the syntax be something like:</p>
  
  <pre><code>15,45,30   *       *       *       *       wget -O /dev/null http://somesite.com/4_leads.php
  </code></pre>
  
  <p>So for example it would run at</p>
  
  <pre><code>2:15
  2:45
  3:15
  3:45
  4:15
  4:45
  </code></pre>
  
  <p>and so on</p>