title: What is the difference between -{minutes} and {minutes} when using the find command on Linux?
body: <p>My understanding of the following command is that it looks for files that have been modified in the last {x} minutes. </p>
  
  <p>What does it mean if I exclude the <code>-</code> from <code>mmin</code>, what is it supposed to return?</p>
  
  <p><strong>COMMAND</strong></p>
  
  <pre><code>find . -maxdepth 1 -mmin -20
  </code></pre>