title: Remove only files in directory on linux NOT directories
body: <p>What delete command can be run to remove only files in given directory </p>
  
  <ul>
  <li>NOT directories</li>
  <li>NOT sub-directories</li>
  <li>NOT files in these sub-directories. </li>
  </ul>
  
  <p>Some files don't have extensions so <code>rm *.*</code> wont work...</p>
  
  <p>There are thousands of files in this folder.</p>
  
  <p>Any advice?</p>