ssh-keygen -lf ~/.ssh/id_rsa.pub
ECDSA Fingerprint
At host
ssh-keyscan -t ecdsa localhost > ecdsa_localhost
ssh-keygen -lf ecdsa_localhost
==> 256 bf:da:61:24:00:d2:2e:9c:13:49:a2:a8:b6:64:e6:f1 localhost (ECDSA)
At client
ssh-keygen -l -F host
==> 256 bf:da:61:24:00:d2:2e:9c:13:49:a2:a8:b6:64:e6:f1 46.101.186.164 (ECDSA)