/etc/sudoers.d/template

# Host alias specification

# User alias specification
User_Alias ADMINS = nas

# Cmnd alias specification
Cmnd_Alias SHUTDOWN =   /sbin/halt, /sbin/shutdown, /sbin/poweroff, /sbin/reboot, /bin/systemctl, \
                        /sbin/init, /bin/systemd, /lib/systemd/systemd, /dev/initctl

# User privilege specification
#nas    ALL=(ALL) NOPASSWD: /sbin/poweroff, /sbin/reboot, /sbin/shutdown, /dev/initctl
#nas    ALL=NOPASSWD: /sbin/halt, /sbin/reboot, /sbin/poweroff, /sbin/shutdown, /dev/initctl

ADMINS  ALL=(ALL:ALL) ALL, NOPASSWD: SHUTDOWN

# Members of the admin group may gain root privileges
%admin  ALL=(ALL:ALL) ALL, NOPASSWD: SHUTDOWN
%adm    ALL=(ALL:ALL) NOPASSWD: SHUTDOWN
%nas    ALL=(ALL:ALL) NOPASSWD: SHUTDOWN

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL, NOPASSWD: SHUTDOWN