Allow users to shutdown
To check if your session is active
$ loginctl show-session $XDG_SESSION_ID --property=Active
The suspend, poweroff and hibernate button presses and lid close events are also handled by logind as described in Power Management#ACPI events.
First install sudo:
# pacman -S sudo
Then, as root, add the following to the end of
/etc/sudoers using the
visudo command. Substitute
user for your username and
hostname for the machine's hostname.
user hostname =NOPASSWD: /usr/bin/shutdown -h now,/usr/bin/halt,/usr/bin/poweroff,/usr/bin/reboot
Now your user can shutdown with
sudo shutdown -h now, and reboot with
sudo reboot. Users wishing to power down a system can also use
halt. Use the
NOPASSWD: tag only if you do not want to be prompted for your password.
For convenience, you can add these aliases to your user's
~/.bashrc if you have it enabled (or to
/etc/bash.bashrc for system-wide settings):
alias reboot="sudo reboot" alias poweroff="sudo poweroff" alias halt="sudo halt"
acpid can be used to allow anyone with physical access to cleanly shut down the computer by using this power button.