dd.sh

#!/usr/bin/env bash

#
# Copyright (c) 2021 Project CHIP Authors
#
# Licensed 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.
sudo mount /dev/sda1 /media

# applying dd command
sudo dcfldd if=/dev/mmcblk0 of=/media/$1.img
if [ $? -eq 0 ]; then

#reducing size of the image using pishrink
cd /media/
sudo pishrink.sh -z $1.img
else
   echo FAIL
fi