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Questions tagged [grub2]

GRUB (GRand Unified Bootloader) is a bootloader package to load operating systems. GRUB2 is a rewrite, and the dominant version since 2009.

Grub (GRand Unified Bootloader) is a bootloader package.

Briefly, a boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the operating system kernel software (such as the Hurd or Linux). The kernel, in turn, initializes the rest of the operating system (e.g. GNU).

Official page

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Grub2 unable to detect MBR disks

While adding a new SSD to my system I went to GPT / UEFI and installed new Ubuntu as well as grub2. Grub2 is working and is able to boot ubuntu/win bootmanager on this new SSD. I'd like to boot my old system in parallel which was working after I…
Reimer
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Fixing LVM boot after disk clone

I have a NVME boot disk that was running low on space in my proxmox server. After using Clonezilla to clone the disk to another larger NVME things are unstable. The boot disk has 2 Logical volumes on it, and seems to get through the boot process…
Doug
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Cannot boot on Arch Linux after modifying kernel parameters with GRUB

Looking for a way to set my backlights on my laptop running Arch Linux (and Windows on a dual boot), I edited the /etc/default/grub file to change a kernel parameter. Here is what I changed: # before edition #…
Romain T-BIGOT
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Detect the boot device (UEFI and GPT)

I'm a little confused, because I can't find a solution to the problem with simple methods or tools. Situation: I need to identify the disk-device (not a partition) where the system is booted from (or the disk-device (not a partition) where there is…
Andrew Orlov
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How to setup background image in grub of Fedora 37 xfce spin?

I installed Fedora 37 XFCE spin on my Lenovo Yoga 4k laptop. The Grub options during the startup looks so small. So I installed sudo dnf install grub-customizer to easily change the grub config through a UI. With the grub-customizer I can change the…
RonPringadi
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How can I find the full list of acceptable `boot=` option of kernel?

I usually see options like boot=casper or boot=live. However, I cannot find anything describe the actual meaning of this option and I cannot find any piece of code handle this option at all. From kernel documents it said: Parameters denoted with…
Wang
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Booting from different LVM snapshots

I am setting up a system for testing software installations automatically. For that, I created an LVM snapshot of a fresh Debian installation. In this snapshot, I want to automatically install, configure and test the software installation, then…
Andreas Schuldei
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Fedora 31 Grub2 configuration change isn't being applied

I've changed GRUB_TIMEOUT=-1 in my /etc/default/grub because I want the grub boot loader to wait forever for me to choose my operating system. Most of the internet says to run update-grub after editing this but it seems like this is a one-line file,…
Swiss Frank
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dpkg: error processing package linux-image-4.15.0-175-generic (/boot/grub/menu.lst not found)

I have this issue on Ubuntu 18.04 Server, probably because /boot/grub/menu.lst doesn't exist: root@myserver:~# apt install -f Reading package lists... Done Building dependency tree Reading state information... Done The following packages were…
Francesco Galgani
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How would I configure grub to skip the menu or set a timeout?

I was able to successfully configure PXE and pressed to get an entirely automated install running except for 1 issue: The GRUB menu pauses indefinitely until the user selects an option. I've got my grub configured with only a single menu option…
user3056541
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Tell Linux/GRUB to start iPXE on next boot?

I've just discovered the wonder that is iPXE. Im running various versions of Debian on many different computers, and would like to remotely tell them to reboot into iPXE, and have iPXE automatically boot into a clonezilla auto-deploy .iso I have. Is…
Moritz von Schweinitz
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Why does grub's os-prober add entries with `linux` instead of `linuxefi`

On my system, I have two copies of CentOS 7 installed, and one copy of Windows 10 Pro. Every system is bootable and works correctly, and is fully up to date (kernels, packages, the works). When I run grub2-mkconfig in either copy of CentOS (one host…
Grismar
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Properly Configuring Grub for a Two-drive raid1 to Support Boot After a Drive Failure

Edit: So, I think the question still applies below, but I realized that the system is actually booting on the second drive, it's just missing /home, /boot and /etc/fstab. I am sure there is more missing, but I guess the better question now is; How…
Will Roberts
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ESXi installation PXE boot with GRUB on BIOS (not EFI)

all documents mention syslinux/pxelinux as a way to pxeboot ESXi installation, but I'd like to stay with GRUB 2. How to do that? I'm able, of course, to load GRUB 2 via network (i386-pc/core.0 for non-UEFI host) but then I can't figure out what…
Jiri B
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How to avoid password change when boot GRUB in debian 10 system?

Per this post,I know it's easy to change password when boot GRUB. When I read set debian grub password ,I run command as below: cat << EOF >> /boot/grub/menu.lst timeout 3 password hackme EOF But it doesn't work,I can still change password when…
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