Step-by-step – Reinstall GRUB on Debian Bullseye Guide

June 30, 2021 | By the+gnu+linux+evangelist | Filed in: Tutorial.

GNU/Linux Debian Bullseye Fixing GRUB Guide

Hi! The Tutorial Shows You Step-by-step How to Reinstall/Fix GRUB 2 in Debian Bullseye GNU/Linux.

And GNU GRUB for Debian Bullseye is a very powerful Boot Loader, which can load a wide variety of Free Operating Systems, as well as Proprietary OSes with Chain-loading.

And a Boot Loader is in charge of loading and transferring control to a Kernel OS Software (such as Linux or GNU Mach).

The Kernel, in turn, initializes the rest of the Operating System (e.g. a GNU system).

Finally, this Setup is Required to Fix an OS Boot after a not achieved Installation or sometimes a GNU+Linux/Windows Dual Boot System.

Step-by-step – Reinstall GRUB on Debian Bullseye Guide
  1. 1. Launching Terminal

    How-to Quick-Start with Command Line on Debian

    Command Line Debian QuickStart Guide

    First, Update the Apt Repo Sources with:

    sudo apt update
    Authenticate with the User Admin Pass.
    If Got “User is Not in Sudoers file” then see: How to Enable sudo.

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