How do I hide a site from search engines? [closed]

Answer 1

Use a robots.txt, deny from all search engines. They don't all respect robots.txt so check your server logs regularly and deny from ranges of suspected robots/crawlers:

http://httpd.apache.org/docs/2.2/howto/access.html

Answer 2

You need to read about robots.txt file you are supposed to copy in your site's webroot – http://www.robotstxt.org/robotstxt.html.