Preventing the Use of the Shutdown Command

To prevent the shutdown command, simply enter the following command on the command line.

nano /etc/sudoers

Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"

Cmnd_Alias ​​SHUTDOWN = /sbin/shutdown,/sbin/reboot,/sbin/halt,/sbin/poweroff

root ALL=(ALL:ALL) ALL

# For specific user
musluyuksektepe ALL=(ALL:ALL) ALL, !SHUTDOWN

%admin ALL=(ALL) ALL
%sudo ALL=(ALL:ALL) ALL

For all users in the group
%interns ALL=(ALL:ALL) ALL, !SHUTDOWN