khclean.sh

#!/bin/sh
# khclean.sh:  Simple script to clean out your known_hosts file
# ----------   Copyright (C) 2014  Leif Hedstrom <leif@ogre.com>
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
HOSTS=$(ssh-keygen -l -f ~/.ssh/known_hosts | grep "$*" | cut -d\  -f 3)

for h in $HOSTS; do
    echo "Removing $h..."
    ssh-keygen -R $h >/dev/null 2>&1
done