GRUB
GRUB (GRand Unified Bootloader) is a boot loader package that enables users to select and load an operating system from a computer's hard drive or other storage devices during startup. It is commonly used in Linux-based systems to manage multiple operating systems or kernel versions, providing a menu interface for boot selection. GRUB supports various file systems and can boot operating systems that do not have native multi-boot capabilities.
Developers should learn GRUB when working with Linux systems, especially for system administration, dual-booting setups, or embedded development where custom boot configurations are needed. It is essential for managing boot processes in servers, virtual machines, or any environment requiring flexible startup options, such as selecting different kernels for debugging or testing purposes.