#!/bin/sh
# Courtesy of Jeffrey Bastian <jbastian@redhat.com> via a post on fedora-devel

KNOWN_HOSTS=~/.ssh/known_hosts
NEW_HOST=$1
IP_ADDR=$(host $NEW_HOST | awk '/has address/{print $NF}')

if ! grep -q $NEW_HOST $KNOWN_HOSTS ; then
        echo "Could not find $NEW_HOST in $KNOWN_HOSTS"
        exit
fi
ssh-keygen -R $NEW_HOST
[ -n "$IP_ADDR" ] && NEW_HOST="$NEW_HOST,$IP_ADDR"
ssh-keyscan $NEW_HOST >> $KNOWN_HOSTS