post_install() {
	setterm -cursor on >> /etc/issue
	printf "\e[37;1m\e[44;1m%s\e[0m\n" "\
- Please reinstall GRUB first:
  # grub-install --target=i386-pc --boot-directory=/your/boot/partition --bootloader-id=GRUB /dev/sdx
 
- Then; look at \"/etc/default/grub.silent\" sample file
  and make necessary changes to \"/etc/default/grub\".
  
- Lastly, regenerate the GRUB config file:
  # grub-mkconfig -o /your/boot/partition/grub/grub.cfg"
}

post_upgrade() {
	post_install
}