ssh-keygen command

How do I fix – “Public key Blacklisted (see ssh-vulnkey(1))” error under any Linux based desktop system?

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How do I change OpenSSH passphrase for one of my private keys under Linux, OpenBSD, FreeBSD, Apple OS X or Unix like operating systems?

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Explains how to fix – warning: remote host identification has changed! Openssh server and client error under any Linux / UNIX / BSD like operating systems.

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