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All I have in my robots.txt file is the bit below - is it enough?
User-Agent: * Disallow:
is it enough?
What is it you want to do?
The robots.txt you have does nothing.
All I want is for every robot for every SE and every directory to visit my website.
You can safely just remove your robots.txt file completely in that case.
It's only used for listing search engine spiders that you do *not* want indexing your site.
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