片刻、瞬間、不知所云...

參考文獻：https://vivaldi.club/d/11869

# vi /etc/polkit-1/localauthority/50-local.d/restrict-login-powermgmt.pkla

[Disable lightdm PowerMgmt]
Identity=unix-user:*
Action=org.freedesktop.login1.reboot;org.freedesktop.login1.reboot-multiple-sessions;org.freedesktop.login1.power-off;org.freedesktop.login1.power-off-multiple-sessions;org.freedesktop.login1.suspend;org.freedesktop.login1.suspend-multiple-sessions;org.freedesktop.login1.hibernate;org.freedesktop.login1.hibernate-multiple-sessions
ResultAny=no
ResultInactive=no
ResultActive=no

:x

再用gui介面登入後就會發現沒有poweroff的按鈕了。

shutdown指令以下列方式處理：

# vi /etc/sudoers

# User privilege specification
root    ALL=(ALL:ALL) ALL
user      ALL=(ALL:ALL) ALL, !SHUTDOWN

:x
存檔後就鎖住該帳下shutdown的功能。

$ shutdown -k
Failed to call ScheduleShutdown in logind, proceeding with immediate shutdown: Access denied
Need to be root.