         Try the following command in the terminal (from the <code>example</code> directory)</p>

        <pre><code>mv unix.txt unix_commands.txt</code></pre>

        <p>Using <code>ls</code>, you'll see that <code>unix.txt</code> is gone -- in its place is a
          file called <code>unix_commands.txt</code>. Furthermore, typing <code>cat
unix_commands.txt</code> will print out the same list of UNIX commands.</p>

        <p>It appears that we renamed <code>unix.txt</code> to <code>unix_commands.txt</c