Fingerprints

Generate a public key from a private key

To generate a public key from a private key:

 ssh-keygen -y -f ~/.ssh/<private key>

Gather the SSH fingerprints of a machine

To gather the SSH fingerprints of a machine and add them in the known_hosts file:

ssh-keyscan -H <host or ip> >> ~/.ssh/known_hosts

Delete the fingerprints SSH of a machine

To delete the SSH fingerprint of a machine and remove them from the known_hosts file:

ssh-keygen -R <host or ip> -f ~/.ssh/known_hosts