GRUB bootloader - Full tutorial
One of the most frightening things about Linux is the horrible word bootloader. The primary reason for this is the fact that most new Linux users have only ever used Windows operating systems. In the Windows world, they have never bothered with bootloaders. For them, the issue of a system booting was a transparent one. At most, they would use Windows Recovery Console to fix problems for them. Thus, they have been spared the need to learn about the single most important piece of software on a computer - the little program that makes it all work.
This article is supposed to provide you with basic understanding of the GRUB bootloader. If you have read my other Linux articles, you are familiar with partitioning and Linux notation, as well as with the command line. The next logical step is to enhance this knowledge by taking one step further. Understanding how GRUB works and what boot entries in the boot menu mean will help you understand how the operating systems work, how to fix, recover or modify the GRUB menu to suit your needs, and how to setup different work environments with several operating systems.
In the past, we have relied on the installation setups to make the hard work for us. In fact, setting up GRUB, while frightening, is a quite simple and fully reversible procedure. Mastering the GRUB is a very important step in building up the confidence to use Linux.
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