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Hi - I am using Red Hat and was wondering how to disable username and password only login and require that a PPK secure key file be used for authentication ? I can log in using the secure private key and the public key that is in ~/.ssh/authorized_keys but i can still log in using the plain username and password login.
If you put an an exclamation point in front of the encrypted password it locks the password. I think at that point ssh still works but havent' tested it.
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requiring PPK secure key, disabling user/passwd login
