Questions tagged [grub2]

GRUB2 is the second revision of the GRand Unified Bootloader, with versions numbered 1.9x and 2.yz.

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How do I get GRUB2 to boot an ISO file like USB/CD?

How do I get GRUB2 to boot an ISO file and get it to display the initial menu screen (like it does when booting an USB/CD via the BIOS) ? For example, the following menu definition ("/etc/grub.d/...
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stuck at busy box, attempt to boot old linux at another partition

I have, and able to boot with arch linux with kernel 5.10.34 normally. I have older linux (linuxmint 20.1) on my sda6 with kernel 5.4.0-72 and 5.8.0-50. I am using grub-customizer. Kindly not answer ...
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How to make sure grub2 has the drivers it needs during a Linux installation?

I'm installing a GNU/Linux system; specifically, it's antiX GNU/Linux 19.3. I'm on a rather old system - from around 2000, and it's a 32-bit processor. Now, if I just go through the installer and only ...
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GRUB - Fedora and Ubuntu on different drives

I normally ran dualboot Ubuntu/Windows and recently decided to try adding Fedora to the list. I'm a bit confused about several things regarding grub, what the arrangement should be, and why a few ...
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How to extend Linux partititon dual booted with Windows? And how to rebuild Grub after extending the partition?

I have dual booted Linux(Kali Linux) and Windows, Due to of shortage storage in Linux ,I want to shrink the Windows partition and extend Linux partition I know there are many posts regarding this, I ...
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GRUB2 Loading into CLI on reboot instead of bootloader

I recently did a fresh install of Pop!_os after getting a little brave and wrecking some stuff on accident. I dual boot Windows 10 and Pop on separate drives. Upon restart, GRUB loads into its grub>...
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GRUB error: unknown filesystem

I am trying to setup lvm on luks2 with boot inside lvm. NAME FSTYPE FSVER FSAVAIL FSUSE% MOUNTPOINT nvme0n1 ├─nvme0n1p1 vfat FAT32 510.7M 0% ...
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How to remove old UEFI boot entry?

Every time my computer boots, I face this GNU GRUB menu: I don't know how to remove it and every time I boot, I have to write exit and then I have to choose the debian entry manually. I've looked ...
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Fixing EFI partition and cloning installation to another drive

This is the situation: I've had a flawless experience with Windows 10/Pop!_OS 20.04 dual booting for a couple of years until yesterday when I booted into Windows, installed a game and when I tried to ...
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Grub has assumed control of my multi-boot, what do I need to learn to take it back?

Even after many years, I'm still an 'arms-length' user of linux. I switched to Mint when XP stopped, use the default configuration, and have not had to interact with Grub before. I use it to get the ...
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When dual booting with Windows, should I switch GRUB or UEFI priorities?

I am reconfiguring my dual boot system, and learning more about UEFI leads me to wonder whether I have been doing things properly. Right now my UEFI priorities are set to boot GRUB, and if I want to ...
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How can repair grub after installing Windows 10?

I have made many experiments,found interesting fact: step1: install debian-buster No EFI partition setup during installation in this step. step2: install windows 10 At this time,grub menu lost,boot ...
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Should a parameter like 'audit_backlog_limit', present in the '/boot/grub2/grub.cfg', be among the 'kernelopts' in the /boot/grub2/grubenv?

While looking over a SUSE Linux Enterprise Server hardening baseline, I noticed that there's a rule checking if the value of audit_backlog_limit is sufficient. checking The way used to check if the ...
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update-grub caused non-booting configuration

I ran update-grub and after this, the system will not boot. It gets stuck in a blank screen. Possible before GRUB, possibly in GRUB that just shows a blank screen. I would normally get a text menu ...
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How does grub-install / grub boot exactly work?

Trying to make an USB with full installed Linux distros, I've landed on a bunch of pages (like this: How can I repair grub? (How to get Ubuntu back after installing Windows?)) explaining how to ...
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Install Grub to USB drive with installed Linux distros inside

I'm trying to make a usb drive with two linux distros installed inside. The idea is to carry the usb drive with me and boot the distros in the computer available at the place where I am at that moment....
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it is Impossible for me to install ubuntu or generally most linux distros on Asus zenbook14 um433iq

I've got a big problem, I can't install ubuntu and some Ubuntu-based Linux distro but Pop Os on my laptop. Let me illustrate the problem, I've tried elementary os, ubuntu, Feren os, KDE neon, Zorin os,...
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Is there any cleanup procedure for incorrectly located GRUB installation?

I'm running Debian Buster and after a GRUB upgrade I started receiving error stating that: The GRUB boot loader was previously installed to a disk that is no longer present, or whose unique ...
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Make grub let me me choose the new kernel

there's somethings I don't understand with kernel installed packages. Sometimes I have all the kernel packages installed in a "basic version" and its upgraded version. Let's say : 4.18.0-240....
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init unable to find root device on computer in restoration

I'm a bit out of solution on this one : I am restoring an old computer (15 years old...), which was running archlinux. I have inadvertently erased the pacman package database (and all /var ...), and I ...
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Boot Linux from ISO Image inside Windows 7 Partion

I have a Windows 7 Laptop from a friend where he wants me to install Linux for him to try. The MBR partition table is already full, so there is no option to add another partition and install Linux ...
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Fedora 33 not booting into latest kernel

Not the best picture (sorry), but every now and again whenever Fedora does an update, it appears to be adding a new line to my boot menu - the picture is old, I now have 3 versions of the kernal in ...
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My 40_custom doesn't work

Hello and thanks for coming help me My 40_custom is as follows : #!/bin/sh exec tail -n +3 $0 menuentry "Kali Linux custom configuration" { search --set=root --label Kali --hint hd0,...
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Dual Boot install failure of Debian 11/Win 10 on UEFI only (Dell Inspiron 17 7706) system

I tried to install a root-encypted Debian 11 (Bullseye, netinst, daily build 2021-03-29, cryptsetup) next to the existing Win 10 as Dual boot on a strict UEFI-only system (Dell Inspiron 17 7706, BIOS ...
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Adding an if condition inside the grub configuration file

By default when I have only one kernel, the output of ls /boot/ | wc -l is 13. However, sometimes I want to compile and install another kernel to my system and after that I want the grub menu to pop ...
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How can I get Windows to let me always boot straight into grub

I dualboot Ubuntu and Windows and have 2 SSD's. The first one, 1TB is dedicated to Windows and the other, 500GB is for Ubuntu. I had it setup to boot into Grub but every time Windows would upgrade or ...
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I had two grubs but not anymore, and I want both back

I have Ubuntu Linux 20.04 and Kali 2021 installed, and before reinstalling both, I had two grubs, the main one showed up when I started the pc, it was the Ubuntu one, and the second one showing up ...
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System keeps booting into Grub2

My system keeps booting into the Grub2 Command Line interface on startup. I used to run Windows 10 and Ubuntu on Dual Boot, and after I updated my Windows 10 to Windows Server 2019, on every startup, ...
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No GRUB entry after installation of manjaro-architect

I have used the XFCE live cd, to launch into manjaro-architect, not the standalone ISO. I am planning to dual boot with windows, but now I have only one SSD plugged in, and aside the firmware having ...
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Grub starts in command line after BIOS update and can't boot any OS

my problem is very similar to this question asked by Antoine Aubry. I have an ASUS laptop with Windows 10 and Ubuntu 20.04.2 LTS installed in dual boot. After a recent BIOS update, when I start my ...
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grub-install: info: … but x86_64-efi platform not available

I've installed LUbuntu on a system and it boots nicely in BIOS mode. Unfortunately I need to boot the system in EFI mode, so I booted the stick again. Made sure that it booted in EFI, mounted ...
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Booting Windows on EFI from Linux msdos (invalid signature)

My first boot partition table is ms-dos style. My fifth disk has GPT table partition GPT, with: EFI partition as first partitiion Windows as 4th partition my /boot/grub.d/gurb.cfg can't boot ...
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Grub2 ignore my grub.cfg

My /boot/grub/grub.cfg is the following, but I can't have the countdown or the auto select after 10 seconds: # # GRUB_DEFAULT="0" GRUB_TIMEOUT_STYLE="menu" GRUB_TIMEOUT="10&...
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Can't boot ISO file from custom grub menuentry

I was attempting to boot an ISO file without a usb, so I added a grub menuentry and when I booted into it, it always just shows a completely black screen, I even tried grml-rescueboot but still the ...
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grub2: specify http location for linux and initrd in grub.cfg

I am trying to configure network boot to install different Linux OS versions on PowerPC environment. I have an CentOS source machine with httpd, dhcpd and tftp configured. My http server is hosting ...
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193 views

Set default boot entry to Windows instead of Fedora

I have the following options on my machine in Grub when I boot it up: Fedora (5.10.21-200.fc33.x86_64) 33 (Workstation Edition) Fedora (5.10.19-200.fc33.x86_64) 33 (Workstation Edition) Fefora (5.8.15-...
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windows missing from boot menu, manjaro

Suddenly windows is missing from bootmenu maybe after an update, or maybe after a sudden shutdown during windows boot process. os-prober output: /dev/sdb1@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot ...
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How can I make Windows bootable again on OpenSuse Leap?

I have installed OpenSUSE Leap on an MS Windows (10 Home) laptop and it now only offers Linux in the boot menu. How can I get Windows into the boot menu? Leap is currently 15.1¹, having been upgraded ...
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How to boot to nvme and install grub to external drive?

I have one SSD and two NVME. My old motherboard does not detect the NVME to boot it. I tried to install the system and the boot in the NVME, but it was not detected by CLOVER (https://github.com/...
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Grub Shell: Boot without graphics drivers

At boot, instead of the usual Menu, I am greeted with the Grub Shell. I know how to set the linux kernel and inintrd image, but using the boot command also apparently loads the GPU drivers (my ...
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Grub: configuration to boot on specific partition without menu

I installed Grub on a UEFI bootable key, this works fine. Now I want to use this key to boot on a single partition, containing an installed Ubuntu. I would like Grub to choose it immediately, without ...
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Grub 2 incident

I'm a fedora Linux user. And right now I am having trouble to boot the OS from grub. All I see is 4 kernels. And when I press return key It shows: error:../../grub-core/script/lexer.c:337:syntax ...
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Ubuntu on Mac: Executing 'grub-install /dev/nvme0n1' failed

I know this is a super common issue, but if I am here it means I have already searched and tried many roads: unsuccessfully. I am trying to install Ubuntu on a MacBookPro 13" 2019, running MacOS ...
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120 views

How to verify signed UEFI binaries?

I'm trying to understand why secure boot works on my machine. It is enabled in the UEFI config, everything boots just fine, and mokutil --sb-state says SecureBoot enabled. But I think it shouldn't. ...
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failed to get canonical path of `/dev/nbd0p1'

I am getting failed to get canonical path of '/dev/nbd0p1' when running upate-grub in a chroot. I mounted the qcow2 disk image with qemu-nbd -c /dev/nbd0 g4.qocw2 && mount /dev/nbd0p1 /mnt. I ...
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Custom signed Centos 7 PXE Secureboot with Shim and grub: invalid kernel signature

As the title suggests, I'm trying to set up a system that uses PXE boot to boot into CentOS7 with custom signing keys. This process is adapted from several guides but the gist of it is that I use grub ...
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How to redirect GRUB2 output to a MMIO serial UART?

Is it possible to redirect GRUB2 output to a MMIO serial UART? For example I have a UART that is displayed in a Linux boot log as: AMDI0020:01: ttyS5 at MMIO 0xfedca000 (irq = 4, base_baud = 3000000) ...
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Kernel Panicking saying that it can't mount root file system

I'm doing linux from scratch, I'm getting this kernel error. My root is on /dev/vdb2. Here is my grub.cfg. I'm using UEFI boot on a virtual machine. Here is my kernel configuration. I have enabled ...
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Created a partition for CentOS 8 and can no longer boot Windows 10

I had a Windows 10 PC and wanted to create a CentOS 8 partition. I shrank the memory of the current partition and left ~100 GB to install CentOS into. Upon installation I selected the partition and ...
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Dual boot (Ubuntu)-(Ubuntu with boot partition on usb)

I have two internal SSDs in my computer, one that currently has Ubuntu 20 installed with the following partitioning: nvme0n1 │ ...

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