ssh-show-host-keys

#!/bin/bash

help() {
   echo 'usage: ssh-show-host-keys HOST'
   echo '       ssh-show-host-keys --help'
   echo
   echo '    HOST should be the same host you use to connect'
   echo '    to the host'
   echo
   echo '    This commend will ssh to the host and display all'
   echo '    its public keys'
   echo
   exit 1
}

[ "$1" == "--help" ] && help

set -e          # stop on error
set -u          # stop on undefined variable
set -o pipefail # stop part of pipeline failing

ssh "$1" 'for k in /etc/ssh/ssh_host_*_key.pub; do ssh-keygen -l -f $k; done | column -t'