What specific robot txt tag officially stops google from posting your links on their web site?
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Author: James Cliff
Author: James Cliff
Also which specific robot txt tag prevents web crawlers, especially deep web from caching your pages and indexing them?
Also which robot txt deletes any cached page google and web crawlers already have?
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You can block them with your spam filter and Firewall
Locate the offensive ip address and put this in your denial of service box on the firewall and spam filter
To block Google from all files:
User-Agent: Googlebot
Disallow: /
To block all agents from a folder:
User-agent: *
Disallow: /folder1/
To block from a file:
Disallow: /private_file.html
Your robot.txt file is just a guide, it can not delete cached pages.
Though you can get a Webmaster Tools account with Google and tell them to delete certain pages.
http://www.google.com/webmasters/tools/