- /etc/default/grub: The main configuration file for GRUB.
- /boot/grub/grub.cfg: The automatically generated GRUB configuration file.
GRUB rescue mode can be a lifesaver when your system fails to boot. By understanding and using the commands available in this mode, you can troubleshoot and resolve common boot issues, getting your Linux system back online. Always remember to back up your GRUB configuration to avoid running into these problems in the future.