My site was hacked, but just for bots [closed]

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http://serverfault.com – Possible Duplicate: My server's been hacked EMERGENCY Help! My site has been hacked. The pages served to regular users are ok, but the pages served to bots (like google and facebook) are spammy. the thing is it's not the whole site, just certain pages, like this: https://www.google.com/search?q=www.radicalislam.org%2Fanalysis%2Fwhen-c... where do i start? running drupal 6 site, under lamp on ubuntu (HowTos)