title: Running a cron every 30 seconds
body: <p>Ok so I have a cron that I need to run every 30 seconds.</p>
  
  <p>Here is what I have:</p>
  
  <pre><code>*/30 * * * * /bin/bash -l -c 'cd /srv/last_song/releases/20120308133159 &amp;&amp; script/rails runner -e production '\''Song.insert_latest'\'''
  </code></pre>
  
  <p>It runs, but is this running every 30 minutes or 30 seconds? </p>
  
  <p>Also, I have been reading that cron might not be the best tool to use if I run it that often. Is there another better tool that I can use or install on Ubuntu 11.04 that will be a better option? Is there a way to fix the above cron?</p>