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Questions tagged [grub]

GRUB (GRand Unified Bootloader) is a multiboot bootloader from the GNU project. This tag is for questions relating to the legacy version of GRUB. Use the GRUB2 tag for questions dealing with GRUB2, a rewritten version.

GRUB (GRand Unified Bootloader) is a multiboot bootloader from the GNU project. This tag is for questions relating to the legacy version of GRUB. Use for questions dealing with GRUB2, a rewritten version.

Usage in Linux Distributions

  • Ubuntu
    • before 9.10 (Karmic Koala): GRUB is the default boot loader
    • 9.10 and later: is the default boot loader
2208 questions
69
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6 answers

Boot from USB using GRUB

My friend's laptop was in a car accident (he's fine!). However the laptop is very old its an Acer Aspire 1520 the CD-rom drive is broken and there is no floppy drive. I made him a USB boot before I took a look at it and found that his BIOS cannot…
user685590
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7 answers

grub2-install: "this GPT partition label contains no BIOS Boot Partition"

There seems to be quite a bit of discussion about this but I can't find a simple answer. When I try to install grub2 I get this error: # grub2-install /dev/sda Installing for i386-pc platform. grub2-install: warning: this GPT partition label…
Robert S
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49
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3 answers

How to fix the Windows 10 boot loader from Windows

I installed Ubuntu on a system that has Windows 10 installed. I can boot to Windows or Ubuntu normally using GRUB. I want to delete Ubuntu partition, but first I must restore the Windows 10 MBR. In Use Bootrec.exe in the Windows RE to troubleshoot…
Codyfly
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49
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3 answers

grub: boot from ISO

How can I boot into an ISO file in GRUB? The ISO file is on a reiserfs partition and GRUB can access it (already tested that).
Albert
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37
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4 answers

"Unable to find root device" on a fresh ArchLinux install

I have installed the latest version of ArchLinux (2014.06.01) on a MacBook Pro 8,1 (15", if that matters regarding hardware) dual-booting with OSX following the instructions in the official install guide. However, when try and reboot into the newly…
hlt
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34
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8 answers

How to make UEFI bios start GRUB, not Windows?

The TL;DR, added in the edit: The question is: How can I make the BIOS prefer GRUB over Windows Boot Manager on the same UEFI boot partition? The problem is not with Grub; Grub does the right thing when the BIOS starts it. The problem is not with…
Jon Watte
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32
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1 answer

How do I check the current boot parameter list in Linux?

During test, I sometimes add/change boot parameters to /boot/grub/menu.lst (suse), or at the grub screen during boot. How do I check what boot parameters have been used after the system is done booting?
peonicles
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29
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3 answers

Why do we need a boot loader?

After the BIOS, or something similar that serves as a firmware, is started, the control is passed to the bootloader, as far as I know. Why can't the BIOS load the OS kernel directly? Also, the GRUB manual says: briefly, a boot loader is the first…
aoeui
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29
votes
3 answers

How to install grub into an .img file?

I did the following: created an empty .img file with dd associated it to /dev/loop0 with losetup created a partition in it with fdisk formatted such partition with mke2fs copied a custom GNU/Linux system into that partition Now I'd like to make…
Francesco Turco
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27
votes
7 answers

How to add a new kernel to grub2

How can we add a kernel to grub2? i knew the stuff we could do with the former versions, but it seems to have changed. What files should we edit?
Amir Zadeh
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25
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4 answers

Why is it possible to change the password of an admin user on linux?

A few days ago, a friend of mine, wanted to show me that he can use my linux even if I don't tell him my password. He entered in GRUB, selected the recovery mode option. My first problem is that he already had access to my files (read only). He…
Ilea Cristian
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25
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8 answers

boot Windows from GRUB rescue

This is my situation: installed Ubuntu without a CD (using unetbootin) dual boot installation (Windows XP+Ubuntu) didn't like the installation and decided to boot into Windows and delete the Linux partitions forgot to fix the mbr from within…
pruefsumme
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24
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2 answers

GRUB: how find partition number (hd0,x)?

i am playing with grub and i change the root using: root (hda,x) how can i know what's x for /dev/sda7 ? fdisk -l Device Boot Start End Blocks Id System /dev/sda1 * 1 1958 15727603+ 7 …
Alexar
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24
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2 answers

How to add Windows 10 to grub boot loader?

I have installed Windows 10 I have installed Linux Mint Silvia and I have chosen a device for boot loader installation - sda. There is not Windows 10 in grub menu when the system starts I have booted via Linux Mint live USB. I Do step by step…
user918291
22
votes
2 answers

Reconstructing Windows EFI files in /boot partition (Linux+Windows dual boot)

I'm dual booting Windows 10 (pre-Anniversary Update) and Fedora 24 on a Lenovo IdeaPad N580 (Intel Pentium B960 2.2GHz, 4GB RAM, UEFI with Secure Boot disabled). I originally had just Windows 10 and then installed Fedora 23 alongside it and…
TheInitializer
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