How to fix Ubuntu entering GRUB?

If Ubuntu enters the grub boot menu, it may be due to corrupted system boot files or misconfigured boot entries. There are several solutions to this issue:

  1. Fixing grub bootloader: You can try booting the system using a Live CD or Live USB, then access the terminal and run the following command to repair the grub bootloader:
sudo grub-install /dev/sdX
sudo update-grub

“/dev/sdX” refers to the hard drive on which your system is installed, which can be viewed using the lsblk command. After running the above command, reboot the system to see if it can enter normally.

  1. Check the boot configuration: You can manually select the correct boot option by entering the Grub boot interface to see if you can boot into the system properly. If you can access the system, you can fix any boot configuration errors by modifying the /etc/default/grub file, and then run the sudo update-grub command to update the configuration.
  2. Reinstalling GRUB boot loader: If the above methods do not solve the problem, you can consider reinstalling the GRUB boot loader. You can use a Live CD or Live USB to boot the system, then enter the terminal and run the following command to reinstall the GRUB boot loader:
sudo grub-install /dev/sdX
sudo grub-mkconfig -o /boot/grub/grub.cfg

Then restart the system and see if it can successfully enter.

By following the above methods, you should be able to resolve the issue of Ubuntu entering the GRUB boot menu. If the problem still persists, it may be due to system file corruption or hardware issues, so it is recommended to back up your data and consider reinstalling the system.

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