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Course: Understanding the GRUB Bootloader

Sep 09, 2009, 03:09 (0 Talkback[s])
(Other stories by BeginLinux)

[ Thanks to An Anonymous Reader for this link. ]

"GRUB stands for Grand Unified Bootloader and was created in 1995 by Erich Boleyn as he wanted to have a multiboot option. Intel based motherboards must be started with a 16-bit operating system because of a limitation to 640 kilobytes of RAM at startup. GRUB is used to facilitate the 16-bit requirement and load the 32-bit Linux kernel. The AMD CMOS is 64-bit so it can load the 64-bit kernel for Linux. In order for GRUB to work it must use a three step process on CentOS."

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