If you're encountering the GNU GRUB error on your Ubuntu machine, don't panic as there are several methods you can try to fix it. Here are some detailed steps that you can follow to troubleshoot the issue:
Method 1: Repairing GRUB boot loader
One of the most common reasons why GRUB fails to load is because it is corrupted or misconfigured. To fix it, you can try repairing the GRUB boot loader by following these steps:
Boot into Ubuntu Live CD/USB.
Open a terminal and type the following commands:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair
Once the installation is complete, run the boot-repair program by typing the following command in terminal:
sudo boot-repair
Click the "Recommended repair" option and wait for the repair process to finish.
Once the process is complete, restart your machine to see if the issue has been fixed.
Method 2: Reinstall Ubuntu
If the GRUB error persists even after trying the repair method, you may need to reinstall Ubuntu. This method should only be used as a last resort as it will erase all data on your hard drive. Here are the steps to reinstall Ubuntu:
Boot into Ubuntu Live CD/USB.
Choose the "Install Ubuntu" option.
Follow the installation wizard, but be sure to choose the option to "Erase disk and install Ubuntu".
Once the installation is complete, restart your machine and check if the issue has been resolved.
Method 3: Check hardware issues
In rare cases, GRUB errors can be caused by hardware issues such as a faulty hard drive or RAM. To identify if there are any hardware issues, you can run diagnostic tests on your machine. Here are the steps to run diagnostic tests:
Boot into Ubuntu Live CD/USB.
Choose the "Test Memory" option to run a memory diagnostic test.
If the memory test passes, choose the "Check disk for errors" option to run a disk diagnostic test.
If any errors are detected, you may need to replace your hard drive.
Hopefully, one of the methods listed above has helped you resolve the GRUB error on your Ubuntu machine. If none of these methods work, you may need to seek help from a professional technician.
