The GRUB (Grand Unified Bootloader) is a crucial part of many Linux distributions, including Ubuntu. It allows users to choose from multiple operating systems when booting up their computers. However, there may be instances where you need to uninstall it. This article will guide you through the process of uninstalling the GRUB bootloader.
To uninstall the GRUB bootloader, you need to boot from a Ubuntu USB key, open a terminal, mount the UEFI boot partition, and remove the GRUB bootloader files using the
rm command. After restarting your computer, check if the GRUB bootloader is still listed in the BIOS boot options. If it’s no longer there, you have successfully uninstalled GRUB.
What You Will Need
Before we start, ensure you have the following:
- A bootable Ubuntu USB key. If you don’t have one, you can create it using tools like Rufus or Unetbootin.
- Basic knowledge of terminal commands.
Please Note: The instructions provided in this article are specific to Ubuntu. They may vary slightly for other Linux distributions.
Step 1: Boot from the Ubuntu USB Key
Insert the bootable Ubuntu USB key into your computer and restart it. As your computer boots up, press the appropriate key (usually F2, F10, F12, or DEL) to enter the BIOS. Select the USB key as the first boot device, then save and exit the BIOS.
Once Ubuntu loads, select the “Try Ubuntu” option to enter the live environment. This will allow you to use Ubuntu without installing it on your computer.
Step 2: Open a Terminal
Once you’re in the live environment, open a terminal. You can do this by pressing
CTRL + ALT + T or by searching for ‘Terminal’ in the application menu.
Step 3: Mount the UEFI Boot Partition
The next step is to mount the UEFI boot partition. This is where the GRUB bootloader files are located. You can do this with the following command:
sudo mount /dev/sdXY /mnt
/dev/sdXY with the actual partition where the UEFI boot files are located. For example, it could be
sudois a command that allows you to run programs with the security privileges of another user (by default, the superuser).
mountis used to mount filesystems.
/dev/sdXYis the partition you want to mount.
/mntis the directory where you want to mount the partition.
Step 4: Remove the GRUB Bootloader Files
Now that you’ve mounted the UEFI boot partition, you can remove the GRUB bootloader files. Run the following command:
sudo rm -rf /mnt/EFI/ubuntu
rmis the remove command.
-rfis a combination of two options.
-Ris for recursive removal, and
-fis for force removal without confirmation.
/mnt/EFI/ubuntuis the directory where the GRUB bootloader files are located.
Step 5: Restart Your Computer
After running the command, close the terminal and restart your computer. Check if the GRUB bootloader is still listed in the BIOS boot options. If it’s no longer there, you have successfully uninstalled GRUB.
Please Note: Reinstalling Ubuntu will automatically overwrite the GRUB bootloader. So, if you’re planning to do a clean reinstall of Ubuntu, there’s no need to manually uninstall GRUB. Simply proceed with the reinstallation, and the new installation will replace the existing GRUB bootloader.
Uninstalling the GRUB bootloader can seem like a daunting task, especially if you’re not familiar with terminal commands. However, with the right guidance, it’s a straightforward process. Remember to always be careful when using the
rm command, as it can permanently delete files.
No, you need a bootable Ubuntu USB key to access the live environment and perform the necessary steps to uninstall the GRUB bootloader.
No, uninstalling the GRUB bootloader will not delete your operating system. It only removes the GRUB bootloader files, allowing you to use another bootloader or boot directly into your operating system.
Yes, you can uninstall the GRUB bootloader even if you have multiple operating systems installed. However, please note that removing the GRUB bootloader may affect the booting process of other operating systems. Make sure you have an alternative bootloader or a plan to boot into your desired operating system after uninstalling GRUB.
Yes, it is possible to reinstall the GRUB bootloader after uninstalling it. You can reinstall GRUB by following the installation instructions specific to your Linux distribution or by using a boot repair tool.
If you reinstall Ubuntu without uninstalling GRUB, the new installation will automatically overwrite the existing GRUB bootloader. You do not need to manually uninstall GRUB before reinstalling Ubuntu.
While the basic steps may be similar, the specific commands and locations of the GRUB bootloader files may vary for different Linux distributions. It is recommended to refer to the documentation or support resources specific to your Linux distribution for accurate instructions on uninstalling GRUB.