SSH – Putty Clear Cache

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:

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 @ : [rsa2@22:]

3. Delete the rows that you need and presto!

That’s all there is to it.

Reference : Clear Putty Cache


Very useful info. Thanks for the tip.