permit nopass :wheel as root cmd /sbin/poweroff
permit nopass :wheel as root cmd /sbin/reboot

permit :wheel

$ poweroff

$ doas poweroff

sudo visudo

%group_name ALL=(ALL) NOPASSWD: /sbin/poweroff, /sbin/reboot, /sbin/shutdown

user_name ALL=(ALL) NOPASSWD: /sbin/poweroff, /sbin/reboot, /sbin/shutdown

alias poweroff='sudo poweroff'

source ~/.bash_aliases

poweroff