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How to Fix GRUB boot failed

Topic: Linux Ubuntu Boot Errors | Status: Updated

What is this error?

The "GRUB boot failed" error indicates that the GRUB (Grand Unified Bootloader) is unable to load the operating system during the boot process. This can occur due to various issues such as incorrect configuration, a corrupted GRUB installation, or problems with the disk where the operating system resides.

How to Fix It

  1. Restart Your Computer: Begin with a simple restart. Sometimes, a temporary glitch can cause boot issues.
  2. Access the GRUB Menu: Hold down the Shift key or press Esc during boot to access the GRUB menu.
  3. Select Recovery Mode: Choose the 'Advanced options for Ubuntu' and select a recovery mode kernel.
  4. Reinstall GRUB: In the recovery mode menu, select 'root' to gain root shell access, and reinstall GRUB with the following command:
  5. grub-install /dev/sda
  6. Update GRUB Configuration: Next, generate a new configuration file with:
  7. update-grub
  8. Check Disk Integrity: Run a filesystem check using:
  9. fsck /dev/sda1
  10. Reboot the System: Type reboot to restart your computer and check if the issue is resolved.
  11. Use Live USB/CD for Repair: If the problem persists, boot from a Live USB/CD and repeat the GRUB reinstall steps from the live environment.
  12. Seek Further Help: If all else fails, consult documentation or community support to troubleshoot hardware-related issues.
Disclaimer: This is an educational guide. We are not responsible for data loss. Always backup your system.

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