title: ls cmd in Mac, showing weird behaviour
body: <p>As screenshot attached, when I do a 'ls' cmd I don't see the <strong>project1</strong> folder.  And 'ls -a' also doesn't reveal it.  I also ensured the file is not marked hidden in Mac. </p>
  
  <p>I am not sure why the folder project1 is only shown if I do a 'ls -l', could you please help to explain?</p>
  
  <p>Thank you very much</p>
  
  <p><a href="http://oi61.tinypic.com/szudr4.jpg" rel="nofollow">link to screenshot</a></p>