How to Repair, Restore, or Reinstall Grub 2 with a Ubuntu Live CD or USB · How to Ubuntu. Grub 2 typically gets overridden when you install Windows or another Operating System. To make Ubuntu control the boot process, you need Reinstall (Repair/Restore) Grub using a Ubuntu Live CD. Warning Using the sudo command, especially from a Live CD can do serious damage to your system.
Read all instructions and confirm you understand before executing any commands. When pasting into the Terminal, use Ctrl+Shift+V, NOT Ctrl+V. Terminal Commands Mount the partition your Ubuntu Installation is on. Sudo mount /dev/sdXY /mnt Now bind the directories that grub needs access to to detect other operating systems, like so. sudo mount --bind /dev /mnt/dev && sudo mount --bind /dev/pts /mnt/dev/pts && sudo mount --bind /proc /mnt/proc && sudo mount --bind /sys /mnt/sys Now we jump into that using chroot. Now install, check, and update grub. This time you only need to add the drive letter (usually a) to replace X, for example: grub-install /dev/sda, grub-install –recheck /dev/sda. GRUB error: sdaX does not have any corresponding BIOS drive [SOLVED] Grub2 - How to fix the UUID in Grub after restore from another machine. Install grub2 from livecd on gpt efi. Purge and Reinstall Grub 2 from the Live CD. Grub/LVM boot problem.
Hi, I have a problem with the grub bootloader, as follows. I have a laptop, with an 80G disk, with Windows XP on the first half of the disk (NTFS), and Fedora core 4 (LVM) on the rest. Dual boot is managed by grub, installed with the Fedora install. I wish to clone this disk, so I don't lose hours of setup/installs on both OS's, and my work, in case of a crash. I did the following: 1) Installed Acronis 10 under Windows, and cloned the entire disk to a 120G USB disk. 2) Restored from that clone onto a new 80G disk of the same geometry, and replaced the existing disk with the newly cloned one. 3) On start-up, got a grub hang, so did the following: 4) Note that after step 3-c) above, I got past the grub hang, and was able to boot Windows. Sorry about the long-winded explanation, but this is frustrating, and I wanted to provide all the details, in the hope that some-one could throw some light on the dark innards of grub vis-a-vis LVM, to resolve this.
Thanks in advance. regards, John. Failed GRUB after 10.04 to 12.04 upgrade in system with LVM. Grub2/Installing. This page details the procedures for installing and reinstalling GRUB 2. The information applies to most versions of GRUB 2, but is specifically written for version 1.99. GRUB 1.99 is included on Ubuntu releases 11.04 (Natty Narwhal) and later. For more information on a variety of GRUB 2 topics, please visit the GRUB2 main page. For information on converting to or from GRUB Legacy, please view the Grub2/Upgrading community doc. The GRUB 2 bootloader is included on all currently-supported versions of the Ubuntu family. GRUB 2 can accomodate traditional computer firmware such as BIOS as well as the newer EFI/UEFI standards.
It is compatible with MBR, GPT and other partitioning tables. All references to GRUB pertain to GRUB 2. GRUB 2 installation is automatically incorporated into a normal Ubuntu installation. The main GRUB 2 folder locations include /boot/grub/ and /etc/grub.d/. Installation Options (LiveCD) Using the Entire Drive ( "Erase disk and install Ubuntu" ): BIOS/MBR Notes via ChRoot. Grub2/Setup. GRUB 2 is the default boot loader for Ubuntu. GRUB 2's method of building the GRUB menu is vastly different from GRUB 0.97. This page describes the new file structure and details how to the user can change the default settings used to create the boot menu. The current version of GRUB is 1.99, which was introduced with Ubuntu 11.04, Natty Narwhal and is the version installed with 12.04, Precise Pangolin LTS. The documentation on this page applies to GRUB 1.99 unless otherwise noted. GRUB 2 builds its menu (grub.cfg) by running scripts found in the /etc/grub.d/folder and the settings in the /etc/default/grub file.
Command can be invoked by a user with Administrator (root) privileges and is automatically run when GRUB 2 packages or the kernel is updated. GRUB 2 incorporates a totally revised directory and file hierarchy. To find out where GRUB 2 is installed, the user can run the following commands: Device: sudo grub-probe -t device /boot/grub UUID: sudo grub-probe -t fs_uuid /boot/grub. Grub2. GRUB 2 is the default boot loader and manager for Ubuntu since version 9.10 (Karmic Koala). 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 a descendant of GRUB (GRand Unified Bootloader). It has been completely rewritten to provide the user significantly increased flexibility and performance. GRUB 2 is Free Software. In this guide, GRUB 2 is version 1.98 or later. GRUB legacy (version 0.97) will be referred to as GRUB. GRUB 2's major improvements over the original GRUB include: Scripting support including conditional statements and functions Dynamic module loading Rescue mode Custom Menus Themes Graphical boot menu support and improved splash capability Boot LiveCD ISO images directly from hard drive New configuration file structure Non-x86 platform support (such as PowerPC) Universal support for UUIDs (not just Ubuntu) GRUB 2 is the default bootloader for Ubuntu. Initial Default Hidden.
GRUB. GRUB (GRand Unified Bootloader) is a multi-boot loader. It is derived from PUPA which was a research project to develop the replacement of what is now known as GRUB Legacy. The latter had become too difficult to maintain and GRUB was rewritten from scratch with the aim to provide modularity and portability [1]. The current GRUB is also referred to as GRUB 2 while GRUB Legacy corresponds to versions 0.9x. BIOS systems GUID Partition Table (GPT) specific instructions On a BIOS/GPT configuration, a BIOS boot partition is required. Note:Before attempting this method keep in mind that not all systems will be able to support this partitioning scheme. Create a mebibyte partition (+1M with fdisk or gdisk) on the disk with no file system and with partition type GUID 21686148-6449-6E6F-744E-656564454649.
Select partition type BIOS boot for fdisk.Select partition type code ef02 for gdisk.For parted set/activate the flag bios_grub on the partition. Master Boot Record (MBR) specific instructions gdisk or.