is is represented in UNIX as a single dot, <code>.</code></li>
          <li><strong>Home directory</strong>: the top-level directory that contains all of your
            files and sub-directories. This is represented in UNIX as a tilde,
            <code>~</code>.
          </li>
        </ul>


        <h3 id="unix-commands">UNIX commands</h3>


        <ul>
          <li>
            <p>Directories:</p>

            <ul>
              <li><code>ls</code>: <strong>l</strong>i<strong>s</strong>t the files