title: In Linux, zip multiple directories in one named zip file
body: <p>I have the following directories, I want to zip up into the same zip file. Can someone provide the correct syntax?</p>
  
  <p>ie. zipping the following directories:</p>
  
  <ul>
  <li><em>/home/users/jlefler/files</em> </li>
  <li><em>/opt/software/reports/files</em></li>
  </ul>
  
  <p>into a zip file called <em>backup.zip</em>.</p>