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I installed nodm, so that Debian starts Xorg and a window manager immediately after booting, without requesting any password and without a login.

How can I similarly setup Debian to shutdown the system automatically, without password prompt, whenever the window manager and Xorg are quit?

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    You'd have to somehow monitor the xorg server/daemon and run shutdown when it quits. As to how you go about this, I don't know. Perhaps something in an X config file could issue that command on termination. Perhaps even in ~/.bash_logout (assuming the default user for nodm is logged out when xorg quits). – Agi Hammerthief Sep 18 '14 at 15:45
  • I think you will find varying avenues based on how the system is shutdown. If a window-manager application is doing it, there will be fewer places to look for a script that can be tuned. If procs are being shutdown by a hot-key or even command line, different options available. – rhoyerboat Dec 5 '14 at 15:34
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Use a displaymanager, which supports scripts like Xreset and Xsession, for example kdm and configure it for auto login.

$ head -n5 /etc/kde4/kdm/Xreset 
#! /bin/sh
# Xreset - run as root after session exits

# Reassign ownership of the console to root, this should disallow
# assignment of console output to any random users's xterm. See Xstartup.

There you can place the shutdown command. Have a look at lightdm, maybe even xdm, if they support such scripts, too. maybe even nodm does.

|improve this answer|||||
  • nodm runs the user session using Xsession script; I haven't specifically checked its reset behaviour, but I'd be surprised if this didn't work. – Toby Speight Jul 15 '15 at 16:26

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