ssh-keyscan

Get the public ssh keys of remote hosts.

• 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