- Missing or Corrupted GRUB: This can happen due to improper shutdowns, partition changes, or installation of another operating system.
- Incorrect Partition Configuration: If GRUB cannot locate the partition where your Linux OS is installed, it may fail to boot.
- Kernel Panics: These are caused by problems with the Linux kernel or its modules, leading to boot failures.
GRUB Rescue mode appears when GRUB fails to find the grub.cfg file or when the GRUB bootloader itself is corrupted. Instead of booting normally, you are presented with a minimal command-line interface.