**It's called robots.txt file
**

Here are a couple of helpful pages..and if you do a search on google for  **robots.text file ** you can get all kinds of info to sort thru..   [

robot text file](http://www.robotstxt.org/robotstxt.html)

many examples on this page

 

“For those who believe, no proof is necessary. For those who don't believe, no proof is possible.”

[Stuart Chase]