Ubuntu – How to shutdown/restart/suspend … without authentication or confirmation

11.10command linejavaprogrammingshutdown

I am looking for a terminal command to shutdown without having to write down my password and without installing any extra programs.

As when clicking the shutdown button, why it is not asking me for the password and a program like gnome-pie that shutdown without asking me for the password and without confirmation.

I want this command as I am a Java programmer and I want to make use of it.

Best Answer

You will need to add command alias for all related command as follows:

Cmnd_Alias SHUTDOWN_CMDS = /sbin/shutdown, /sbin/halt, /sbin/reboot

and after that you need to add a user specification as follows at the end of /etc/sudoers file

<your username> ALL=(ALL) NOPASSWD: SHUTDOWN_CMDS

You will need root permissions to write to sudoers file.

This is from ubuntu community documentation at https://help.ubuntu.com/community/Sudoers#Shutting_Down_From_The_Console_Without_A_Password

Related Solutions

Ubuntu – How to give shutdown privileges to a user

You can shut down or restart using HAL or ConsoleKit which will not require you enter an username/password:

HAL (older Ubuntu versions):

dbus-send --system --print-reply --dest=org.freedesktop.Hal /org/freedesktop/Hal/devices/computer org.freedesktop.Hal.Device.SystemPowerManagement.Shutdown

ConsoleKit (newer Ubuntu versions, tested on Ubuntu 11.04):

dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit /org/freedesktop/ConsoleKit/Manager org.freedesktop.ConsoleKit.Manager.Stop

Ubuntu – How to safely shut down Xfce from the terminal

I think what you want is xfce4-session-logout (online manpage).

Excerpt from the manpage (reformatted, filtered):

   The  xfce4-session-logout command allows you to programmatically logout
   from your Xfce session. It requests the session manager to display  the
   logout  confirmation  screen,  or,  if  given  one  of the command-line
   options below, causes the session manager to take the requested  action
   immediately.

OPTIONS:
   --logout     Log out without displaying the logout dialog.
   --halt       Halt without displaing the logout dialog.
   --reboot     Reboot without displaying the logout dialog.
   --suspend    Suspend without displaying the logout dialog.
   --hibernate  Hibernate without displaying the logout dialog.
   --fast       Do  a  fast shutdown.  This instructs the session manager not to
                save the session, but instead to quit everything quickly.

So to shut down, use

xfce4-session-logout --halt

and to reboot, use

xfce4-session-logout --reboot

If you just want to get the dialogue where you can pick an action manually, run it without arguments:

xfce4-session-logout

Best Answer

Related Solutions

Ubuntu – How to give shutdown privileges to a user

Ubuntu – How to safely shut down Xfce from the terminal

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