Add Power Off and Reboot to grub menu

To add Power Off and Reboot options to grub menu, you need to update a file in your grub configuration directory.

cd /etc/grub.d

Open 40_custom in your favorite editor

For me its micro :

micro 40_custom

Add following line at the end of the file

 menuentry "Reboot" {
      reboot
}

menuentry "Power Off" {
      halt
}

Do not change the exec tail line in the file

Update your grub.cfg file

• For Debian based distros

update-grub

• For Arch based and Other distros

grub-mkconfig -o /boot/grub/grub.cfg