I need help with GRUB config

Linux Support
1

Hi

It asks password on each boot (even if it is regular boot via power button).

But i need to lock only GRUB menu and avoid password resets.

So my goal:

  1. Power button → normal boot (no password)
  2. If trying to access grub menu → ask password

Linux Mint 22, Cinnamon. One and only system (no dual boots needed).

Thanks for your attention!

2

Follow advice at your own risk, errors here can result in not being able to boot into your system. You have been warned:

To require a password only for editing/accessing GRUB menu (not normal boots):

Remove global GRUB password:

Edit /etc/grub.d/40_custom or /etc/grub.d/00_header and remove/comment out any set superusers and password_pbkdf2 lines you previously added.

Generate a password hash:
grub-mkpasswd-pbkdf2
(copy the resulting hash)

Set user/password in /etc/grub.d/40_custom:

set superusers="yourname"
password_pbkdf2 yourname <the-long-hash-from-grub-mkpasswd-pbkdf2>

Make boot entries unrestricted:
Edit /etc/grub.d/10_linux, find lines starting with menuentry, and add --unrestricted to each.

Then:
sudo update-grub

Result:
Boots normally with no password. Password is only required to access/edit GRUB menu.

Have you heard of the Linux Mint forums? Also a great place to search for exisiting solutions: https://forums.linuxmint.com/

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