When using site:mysite.com in google I stumbled upon a return that may be a duplicate content issue. Below is the return from google.
Index of / foldername
www.mysite.com/foldername/ - cached
Index of /foldername. Parent Directory - files of folder listed here
In the root of my site is a page that lists and points to the different articles (file.php) in this folder so it seems to me that this could cause duplicate content.
But I am not sure what entry to make in my robots.txt file to get rid of this non-existent file.
Would I use Disallow: /foldername/index.html