The GRUB Bootloader

The GRUB (GNU GRand Unified Bootloader) is a program that helps your computer start up. When you turn on your PC, GRUB loads first, allowing you to select which operating system or version of the OS you want to run, especially if you have multiple installed. It manages the boot process, offering options to boot into Windows, Linux, or other systems. Essentially, GRUB acts as a bridge between your computer's hardware and the operating system, making it easier to choose and launch your preferred system during startup.