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How do I tell if Putty already knows about and has cached credentials for specific ssh servers?

Another way to ask this question is what is the Windows/Putty equivalent of a unix/ssh known_hosts file?

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migrated from stackoverflow.com Oct 8 '10 at 19:35

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up vote 67 down vote accepted

Putty stores known hosts under a registry key: HKEY_CURRENT_USER\SoftWare\SimonTatham\PuTTY\SshHostKeys.

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