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Clear Putty's Cache

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For all those of you who have been trying to clear Putty’s cache of host fingerprints (Windows) for development or testing, here is the answer:

The best way to do it, type in the command line in the same folder as putty.exe

putty -cleanup

Another way using delete registry key by force:

1. Open the registry (regedit)
2. Go to HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\SshHostKeys

There you should see Putty’s cache of host keys.
The ‘name’ column tells you which key is for which server.

For example, it will have the format of <algo>@<port>:<host> [rsa2@22:172.16.117.159]

3. Delete the rows that you need

That’s all there is to it.

 

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LEMURSOLUTION - Technical articles

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