ambari/contrib/agent-simulator/docker_image/ssh_service/set_root_pw.sh

#!/bin/bash

# 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 rega4rding 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
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if [ -f /.root_pw_set ]; then
	echo "Root password already set!"
	exit 0
fi

PASS=${ROOT_PASS:-$(pwgen -s 12 1)}
_word=$( [ ${ROOT_PASS} ] && echo "preset" || echo "random" )
echo "=> Setting a ${_word} password to the root user"
echo "root:$PASS" | chpasswd

echo "=> Done!"
touch /.root_pw_set