

Grub version 1.99 became the default on Ubuntu 11.04 (Natty Narwhal) and introduced some major changes in the Grub file contents. To determine your version, use grub-install -V. GRUB legacy (version 0.97) will be referred to as GRUB. In this guide, GRUB 2 is version 1.98 or later. It has been completely rewritten to provide the user significantly increased flexibility and performance. GRUB 2 is a descendant of GRUB (GRand Unified Bootloader). As the computer starts, GRUB 2 either presents a menu and awaits user input or automatically transfers control to an operating system kernel. GRUB 2 is the default boot loader and manager for Ubuntu since version 9.10 (Karmic Koala). Booting FreeBSD, NetBSD, and chainload or multiboot OSes.Preventing booting via Grub command-line.Last Boot Failed or Boot into Recovery Mode.
