How to fix GRUB Bootloader in Ubuntu?

The GRUB (Grand Unified Bootloader) bootloader is a crucial component of the Ubuntu operating system, responsible for loading the OS during the boot process. Encountering issues with the GRUB bootloader can prevent your system from starting correctly, leading to frustration and downtime. This guide will walk you through the steps to fix the GRUB bootloader in Ubuntu, ensuring your system boots smoothly and efficiently. Whether you are facing a bootloader error, a missing GRUB menu, or an unresponsive system, our comprehensive instructions will help you restore the GRUB bootloader and get your Ubuntu system up and running in no time.

In this article, we will discuss the methods required to Fix the GRUB Bootloader on Ubuntu when it starts malfunctioning while switching to another OS.

Quick Highlights on GRUP Booatlaoder on Ubuntu

• The GRUB stands for the Grand Unified Bootlaoded.
• The GRUB comes up along with the normal installation of the Ubuntu operating system.
• The GRUB can also be installed on the device manually with the Ubuntu Terminal.
• The GRUB Comes up with Multiboot Specification.
• GRUB can directly go inside the OpenBSD, FreeBSD, etc.
• GRUB supports various File System & Encryption methods in the boot menu.

How to Fix GRUB Bootloader on Ubuntu?

To Resolve the GRUB Bootloader Problem on Ubuntu OS, the following guidelines should be executed. We will start with the Live Image Method.

Method 1: Fix GRUB Bootloader on Ubuntu using Live Image

Step 1: Open the Ubuntu ISO File & go for the Try Ubuntu.

Step 2: Open the Terminal & execute the following command.

sudo add-apt-repository ppa:yannubuntu/boot-repair

Step 3: Now, fix the issues on GRUB using the Linux Command as mentioned below.

sudo apt install boot-repair

Also Check: How to Bypass Grub Rescue on a Linux Computer?

Method 2: Fix GRUB Bootloader on Ubuntu Reinstalling GRUB on Ubuntu

Step 1: On your Terminal, execute the following series of commands. It is nothing just to make the path to a certain directory. Such a command will not provide any output.

Series of Commands:

mount /dev/sda1 /mnt
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /sys /mnt/sys
mount --bind /proc /mnt/proc

Step 2: Now, it is time to reinstall the GRUB in the same directory where the GRUB was first present. It will replace the existing GRUB with the new one.

grub-install /dev/sda

Method 3: Fix the GRUB Bootloader on Ubuntu using the GRUB Terminal

Step 1: Open GRUB Terminal & execute the following commands. The First Command will start the Root System. And the Second & Third Commands will help to Boot into Normal Mode.

First Command

set root=(hd0,pt2)

Second Command

insmod normal

Third Command

normal

Step 2: Now, the Linux Default Terminal will appear. Just execute the Boot Linux Command to fix all the issues.

Fixing the GRUB bootloader in Ubuntu is an essential skill for maintaining a healthy and functional system. By following the steps outlined in this guide, you can troubleshoot and repair common GRUB bootloader issues, ensuring your Ubuntu system boots correctly. Regular maintenance and prompt resolution of bootloader problems can prevent future disruptions and keep your system running smoothly. If you encounter persistent issues, seeking help from the Ubuntu community or professional support services can provide additional assistance and ensure your system remains stable and reliable.

Also Read

• How to Find and Fix Broken Packages on Linux?
• How to Restore Default Repositories in Ubuntu?
• How To Resolve Permission Denied Error On Ubuntu?