ssh-keyscan

Get the public ssh keys of remote hosts.

More information.

• Retrieve all public ssh keys of a remote host:

ssh-keyscan {host}

• Retrieve all public ssh keys of a remote host listening on a specific port:

ssh-keyscan -p {port} {host}

• Retrieve certain types of public ssh keys of a remote host:

ssh-keyscan -t {rsa,dsa,ecdsa,ed25519} {host}

• Manually update the ssh known_hosts file with the fingerprint of a given host:

ssh-keyscan -H {host} >> ~/.ssh/known_hosts

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