ssh-known-fingerprint

#!/bin/sh -e
# SPDX-License-Identifier: WTFPL
# shellcheck enable=

if [ $# -lt 1 ] || [ $# -gt 2 ]
then
	echo "usage: $0 HOST [PORT]" >&2
	exit 64
fi

if [ -z "$2" ]
then
	host=$1
else
	host="[$1]:$2"
fi

ssh-keygen -l -F "$host"