What Should be Right Robots.txt??

[thcychu]

I have created new forum and that forum is in subdomain directory. Would you please suggest best robots.txt for this forum. url forums(dot)thychu(dot)com. Thanks in advanced

[thcychu]

Waiting for reply. {please delete duplicate post by mistake created}

[Robert.]

I'm sorry, but I am slightly confused. You don't need a robots.txt, unless you want to block robots from your site. Can you tell us what bots you want to block?

[thcychu]

I'm sorry, but I am slightly confused. You don't need a robots.txt, unless you want to block robots from your site. Can you tell us what bots you want to block?

Every bot should be crawl forum but don't want duplicate content on search and nothing else.

[thcychu]

is it right robots file. This guy posted here http://www.simplemachines.org/community/index.php?topic=434437.0