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Ubuntu: Grub fix - how to

  • Oct 09, 2025
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If Ubuntu is no longer listed in Grub, you need to repair it. This can be caused by a subsequent Windows Installation or, in rare cases, also by the Install of other Linux distributions. In this case, you need to repair Grub to be able to re-boot into Ubuntu. We will show you how you can accomplish this with just a few hand movements.

Grub repair in Ubuntu via Boot-Repair

Grub can repair it under Ubuntu with a Tool called "Boot-Repair". For this you need the installation media with Ubuntu installed. If you do not have, you can Ubuntu here in the 32-Bit or 64-Bit variant download. If you need help Installing the Image need, you can find all of the matching information in another article.
  1. Restart your Computer and boot from the CD.
  2. Select the Option "try Ubuntu".
  3. Go to a Terminal and enter the following lines:
  4. sudo add-apt-repository ppa:yannubuntu/boot-repair
  5. sudo apt-get update
  6. sudo apt-get install -y boot-repair
  7. boot-repair
  8. With the last command, the repair program starts up. Now select "Recommended Repair", so the default option.
  9. Now Grub properly, and Ubuntu should be in case of a restart to be detected.
You want to the boot order in Grub to change, we will show you in the next article, how to do it.

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