ubuntu重启&；带密码的关机命令

我正在用Java编写一个程序来关闭Ubuntu服务器

 echo password | sudo -S shutdown -h now
 sudo -p 'password' shutdown -h now

两个命令都不起作用

我需要sudo命令关闭并通过传递密码重新启动我的服务器。

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因为我是从程序中执行此操作的，所以它不应该提示输入密码。密码也应随命令一起发送。任何建议都会很有帮助。…

sudo的-p选项指定提示，而不是密码。看看-a选项。sudo手册页摘录-：

 -A          Normally, if sudo requires a password, it will read it from the current 
             terminal.  If the -A (askpass) option is specified, a
             helper program is executed to read the user's password and output the 
             password to the standard output.  If the SUDO_ASKPASS environment variable 
             is set, it specifies the path to the helper program.  Otherwise, the value
             specified by the askpass  option in sudoers(5) is used.

助手程序必须输出正确的密码。因此，要指定帮助程序-：

 export SUDO_ASKPASS="/path/to/helper"