13.4. Resetting GRUB

Procedure

1. Remove the configuration files:

   # rm /etc/grub.d/*
   # rm /etc/sysconfig/grub

2. Reinstall packages.

   • On BIOS-based machines:

     # dnf reinstall grub2-pc grub2-tools

   • On UEFI-based machines:

     # dnf reinstall grub2-efi shim grub2-tools grub2-common

3. Rebuild the grub.cfg file for the changes to take effect:

   # grub2-mkconfig -o /boot/grub2/grub.cfg

   This applies to both, BIOS and UEFI based systems.

   警告

   The path to rebuild grub.cfg is same for both BIOS and UEFI based machines. Actual grub.cfg is present at BIOS path only. The UEFI path has a stub file that must not be modified or recreated using grub2-mkconfig command.

4. Follow Reinstalling GRUB procedure to restore GRUB on the /boot/ partition.