GRUB supports Logical Block Addressing (LBA) mode. Supports setting of passwords with encryption for security GRUB provides a true command-based, pre-OS environment on x86 machines. Supports multiple hardware architectures and operating systems such as Linux and Windows GRUB can read ext2 partitions, allows GRUB to access its configuration file, /boot/grub/nf GRUB has the following prominent features: If Stage 2 cannot find its configuration table, GRUB will cease the boot sequence and present the user with a command line for manual configuration. Stage 2 can be located anywhere on the disk. Stage 2 points to its configuration file, which contains all of the complex user interface and options we are normally familiar with when talking about GRUB. Stage 1.5 also exists and might be used if the boot information is small enough to fit in the area immediately after MBR. Stage 1 is located in the MBR and mainly points to Stage 2, since the MBR is too small to contain all of the needed data.

GRUB replaces the default MBR with its own code. GRUB stands for GRand Unified Bootloader.īy default, MBR code looks for the partition marked as active and once such a partition is found, it loads its boot sector into memory and passes control to it.

GRUB will work well with Linux, DOS, Windows, or BSD. GNU GRUB is a bootloader (can also be spelled boot loader) capable of loading a variety of free and proprietary operating systems. There are several boot loaders we can install together with Linux on our systems. Usually contain several ways to boot the OS kernel and also contain commands for debugging and/or modifying the kernel environment. Used to boot other operating systems, usually each operating system has a set of bootloaders specific for it When a computer is powered-up or restarted, the basic input/output system (BIOS) performs some initial tests, and then transfers control to the master boot record (MBR) where the boot loader resides. Bootloader or Boot Manager is a piece of code that runs before any operating system is running.

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