該shell腳本有如下點：

• bash or dash
• case語句的寫法
• 腳本help寫法
• 參數是否為空的寫法
• 參數

#! /bin/bash
case "$1" in
    -h|--help|?)
    echo "Usage: 1st arg:pin name, 2st arg:reset time"
    echo "1st arg pin name:lte-reset,zigbee-reset"
    echo "2st arg reset time in ms"
    exit 0 
;;
esac

if [ ! -n "$1" ]; then
    echo "pls input 1st arg
 
"
    exit
fi


if [ ! -n "$2" ]; then
    echo "pls input 2st arg"
    exit
fi

echo "you will reset $1 with $2ms"
echo 0 > /home/gpio/$1
time=$[ $2 * 1000 ] 
echo $time > /home/gpio/$1

[shell]簡單的shell提示和參數腳本