Ubuntu免密码输入关机脚本

备注：命令很简单，重点在于不需要输入密码。可以结合自定义桌面图标，一键执行脚本。

#!/bin/bash
PASSWORD=
echo $PASSWORD  | sudo -S shutdown -h $1

man sudo

-S          The -S (stdin) option causes sudo to read the password from
            the standard input instead of the terminal device.  The pass‐
            word must be followed by a newline character.