Got a output after updating GRUB

[RaptaG]

I got this:

To use the new features provided in this GRUB update, it is recommended
   to install it to the MBR or UEFI. Due to potential configuration
   incompatibilities, it is advised to run both, installation and generation
   of configuration:
     $ grub-install ...
     $ grub-mkconfig -o /boot/grub/grub.cfg

What should I do? Is it safe to reboot?

[dalto]

The short answer is that the recommended action would be to run an appropriate grub-install for your install followed by grub-mkconfig -o /boot/grub/grub.cfg

The long answer is in all the responses to this topic:

Grub Updated Seamlessly

You should probably use grub-install --no-nvram You shouldn’t do this via a script because you can’t guarantee that grub will be updated via your script. That is why hooks are better. Although it has only happened once, one of the things that came to light during this situation is that the grub devs expect grub-install to be run every time grub is updated. So issues could occur at any time in the future as well. Also, if you don’t run grub-install after a grub update, you would won’t be …

[joekamprad]

But … nice to see a user actually reading the messages and warnings from the update terminal!