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

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Mount CD/DVD in GRUB

How to access CD's content in GRUB, when booted from HDD? This is what I would like to do: title Boot from CD with modified parameters root (cd) kernel /live/vmlinuz <my ...
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1answer
343 views

Grub 2 multi image boot disk boots some images but restarts on others

The issue I'm having is that my bootable usb I have only works with certain boot images, to be more specific it will boot Ubuntu desktop iso images but not Ubuntu server. If I try to boot Ubuntu ...
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1k views

Arch linux root device problem in '/dev/mapper/MyStorage-rootvol'

I installed Arch x86_64, these are the commands I used during the installation: # parted /dev/sda (parted) mklabel msdos (parted) mkpart primary ext2 2MiB 2GiB (parted) mkpart primary ext4 2GiB 100% (...
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1answer
364 views

Read the UUID of a known partition into a variable in GRUB

I'm already successfully booting the loop mounted arch installation iso (and couple of other isos) using grub on flashdrive. I have grub files in /boot/grub on the flash, iso files in /boot/iso (see ...
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117 views

Boot GRUB2 with Degraded RAID5

I am building a custom NAS with Debian Jessie. Has three 4TB hard drives in a software RAID5 configuration. Works perfectly when all three drives are present. I am trying to test what happens when if ...
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1answer
2k views

grub-install : File descriptor 3 leaked on vgs invocation

I installed Debian Jessie on a LVM in a software RAID 1. To make sure MBR are written on both disks of the RAID 1, I run dpkg-reconfigure grub-pc (as suggested here) and select both disks. I get ...
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134 views

Grub Refuses New Kernel

so my Mint 17 hasn't been booting, and I tried reinstalling the kernel from a live USB drive. I followed the steps detailed in this guide to edit /etc/default/grub to accept the last saved kernel (...
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2k views

Recover from emergency mode on Centos 7

I have a Dell PowerEdge R420 which has installed Centos 7 and was working fine. One day I removed the disks that Centos 7 was installed (2 disks with RAID-1 layout) and I installed another clean disk ...
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1answer
206 views

restoring grub mint 17

I'm currently trying to get my Mint 17 partition booting again. I tried to fix a booting problem with boot-repair and a live USB, but upon inputting the command sudo chroot "/mnt/boot-sav/sda7" apt-...
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298 views

how to make GRUB find modules on multiboot Linux LiveUSB?

background (skip to header=problem if you're expert on LiveUSBs, ISOs, GRUB2, etc) I'm setting up a multiboot/multiISO Linux LiveUSB as detailed here, which I intend for use on multiple hosts (i.e., ...
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1answer
71 views

Can GRUB 2 handle GPT? [closed]

I have come across some articles that say grub can't normally handle GPT. Not sure if this is old facts or outright incorrect and what version of grub is being referred to. Can someone please explain ...
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629 views

Syntax error in grub.cfg on update-grub (Grub 2) (memtest86+)

When I run update-grub or I try to reinstall it, I get a "syntax error". The output is somewhat like this: error: syntax error. error: Incorrect command. error: syntax error. error: line no: 262 ...
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Fedora 22 on MacBook Pro (Retina, 15-inch, Mid 2015)

I recently installed Fedora 22 on my new MacBook Pro. Good news: Wi-Fi works out of the box, so you can update the system immediately to resolve the faulty video driver issue (under bad news). ...
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1answer
345 views

How to re-install grub2 [duplicate]

Windows 8.1 came pre-installed in my laptop, I installed Debian 8 on dualboot, the day before yesterday I had to reset BIOS settings, after resetting BIOS is also reseted MBR for windows only, system ...
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1answer
208 views

How to set MBR to Linux Partition instead of GRUB

I have a Linux Mint 17.1 Partition at /dev/sda1 and another Mint 17.1 Partition at /dev/sda5. How do I set the MBR to boot into /dev/sda1 instead of the GRUB menu? I know how to use GParted to delete ...
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2answers
2k views

Installing GRUB2 on an external HDD without a live CD

I have cloned my HDD to an external HDD and now I need to install GRUB to make the external HDD bootable. The external HDD is meant as a mirror backup for my current HDD (I mean that once the ...
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460 views

Startup and shutdown issues after Fedup from Fedora 20 -> 21 -> 22

After running fedup to upgrade from Fedora 20 to 21, and then to Fedora 22, I have been experiencing issues with startup and shutdown. On reboot, I get the 3 versions on my Grub list. When I select ...
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1answer
178 views

Configure Grub Update to Install on Partition

I have a Windows 7 & Ubuntu dual boot system. I just installed automatic updates to GRUB. First update broke Ubuntu boot, which I fixed by installing grub to dev/sda3 in a chroot. Second update ...
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1answer
4k views

How do I repair grub2 (not) booting 32-bit EFI on a 64-bit machine?

I have an Asus EeeBook X205TA which proves very difficult to install Linux on due to obscure new hardware and 32-bit EFI on 64-bit hardware. I have seen and read a lot of material and I am almost ...
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1answer
204 views

How to boot Sabayon linux with isoboot= and overlayfs parameters?

https://bugs.sabayon.org/show_bug.cgi?id=4941 I don't understand, how sabayon's initrd image is created. (I am just installing that system for the first time!). When I am trying parameters from ...
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1answer
309 views

grub/systemd boot removed partition

I have an Asus Zenbook UX32VD. This laptop has a 500GB HDD and a built in 24GB iSSD (not sure what the i is for). Since I first got it three years ago I have been installing various linux ...
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203 views

Arch and Windows 7 dual boot with encryption, replacing existing Linux install

I have a computer with 3 hard drives: 120 GB SSD, which Arch identifies as sdb 1 TB spinny drive, which Arch identifies as sdc 160 GB spinny drive, which Arch identifies as sda Currently, Windows ...
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1answer
49 views

What can cause GRUB2 to suddenly not be recognized by EFI?

I have two hard drives in my PC. The first one contains an ext4 partition with Debian, a swap partition and the EFI partition for Debian. The second hard drive contains Win8 and it's EFI partition. ...
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1answer
934 views

Wheezy to Jessie update broke root software RAID, can it be fixed?

Last night I attempted to update my PC from Debian 7, Wheezy (now old stable), to Debian 8, Jessie (now stable). On rebooting, the system broke at 0.267166 minutes into the launch telling me it can't ...
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1answer
50 views

loading grub boot loader

I am trying to install a dual boot on my system. I have windows8.1 installed and I am installing opensuse13.2. I restart my system, go to the boot menu and start my installation from my CD drive. ...
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1answer
144 views

grub2 command line loaded instead ubuntu os

I have a strange problem. After installing ubuntu on usb stick (at already installed ubuntu computer), after removing usb stick with installed ubuntu from computer I get the trouble: after booting to ...
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1answer
106 views

Where to install GRUB?

I am running Ubuntu 14.04 on a remote server. It's the only OS installed. I need to be super-cautious before rebooting the machine since KVM access to the server is quite tricky. During a GRUB update,...
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166 views

Cannot install grub-pc

When trying to install grub-pc I get the following messages: Setting up grub-pc (2.02~beta2-22) ... Generating core.img grub-probe: error: failed to get canonical path of `unionfs'. Installing for ...
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689 views

Setting the EFI Framebuffer's Resolution during boot

I've got a MSI WD-60 laptop running Gentoo. It has one of those 3840x2160 screens so I've had to setup Gnome/Firefox/IntellJ to double their DPI for anything to be readable. It all works fine except ...
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1answer
90 views

Problems with secondary hdd in grub

I had some problems installing Linux mint and or any other Linux distribution in combination with Windows. When I booted my machine it would hang before the grub bootloader showed up. Now i have some ...
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2k views

Grub - boot debian iso file from ntfs partition and install it

I have problem installing debian directly from hard drive. Say, i have a logical partition /dev/sda5 and there is debian DVD iso file located in (hd0,5)/iso/debian-8.0.0-amd64-DVD-1.iso with initrd ...
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Why does grub2-install escape chroot jail?

I have an odd experience. Scenario: I am writing a Linux installer (based on OpenSUSE 12.2) that runs in an initrd (actually initramfs), and I'm trying to update the bootloader. A copy of the ...
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1answer
26 views

Different linux OS on particular hdd

Have Adaptec RAID controller. There're 4 hdds on it. Existed Centos 5.10 on: /dev/sda1 - /boot ext3 /dev/sda2 - LVM I decided to migrate to Centos 7 and installed It on: /dev/sdd1 - /boot XFS /dev/...
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1answer
925 views

Grub returns File not found when booting on a new disk with Debian Jessie

I installed Debian Jessie on a new hard disk, and wanted to boot from this new disk. At the end of Debian setup, I choosed setup Grub also. But when booting, Grub falls into rescue mode with a File ...
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242 views

Grub-install: what's the root directory

Can anyone provide a clear explanation what the root directory is for grub-install and when to use it?
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183 views

grub-mkconfig generates duplicate entries for an Ubuntu/Gentoo dual boot setup

I'm currently running Ubuntu (Xubuntu, specifically) as the primary OS on one of my systems. I've been building up a Gentoo installation on a new logical volume on the same system and I'm at the point ...
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1answer
162 views

How do I find/change where GRUB 2 gets installed on a rewrite, on Debian Wheezy?

I have a Debian Wheezy system. On a recent upgrade, I got an error message from GRUB telling me that embedding was not supported for ext2 file systems (huh? Never seen that one before.) and after a ...
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328 views

Dynamic Grub2 configuration via http

This may be a long shot, but I'm wondering if it's possible to load a configfile from an embedded config with grub via http. Something like: insmod net insmod http set net_default_server=${http_ip} ...
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1answer
10k views

Ubuntu 14 server edition, how to boot into single-user mode?

I'm new in Linux and just have basic knowledge about it. In the past I've tested to boot into single-user mode in some Linux distribution by just append " single" to the boot command. However, I don't ...
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1answer
2k views

Required GRUB modules for booting on mdadm RAID1

I have a mdadm-managed RAID1 with a single EXT4 partition on it (having both the OS files and GRUB's files in /boot/grub), and I'd like to know what modules and what configuration do I need for GRUB ...
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1answer
192 views

In Elemenary os, grub wont load anything but itself

I am running Elementary OS Freya as the only currently installed OS on my laptop, I have tried to install various operating system via USB and UNetbootin, however my grub for some reason just will not ...
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1answer
746 views

What's the difference between `grubx64.efi`and `gcdx64.efi`

CentOS7 package grub2-efi provides two files that are very similar. -rwxr-xr-x 1 root root 1070976 Mar 26 09:27 ./boot/efi/EFI/centos/gcdx64.efi -rwxr-xr-x 1 root root 1070976 Mar 26 09:27 ./...
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3answers
939 views

Check installed grub2 modules

I run CentOS 7. Is there a way (e.g., a command) to check which grub2 modules are currently installed?
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565 views

GParted Live on Hard Disk with Ubuntu

Edit Please note that I fixed the original problem of not booting, but I still can't get it to run X-windows after being prompted for language, input, and display resolution. Original question I read ...
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2k views

Problems in using GRUB2 - Manjaro

I hope you are well! I use Manjaro x64_86, using GRUB2 and EFI. I made a large error after coming home from a night shift. I accidentally removed my boot partition when attempting to format an ...
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200 views

Convert Grub2 entry to Syslinux

I have been trying to do it for hours now, but so far I was unable to. I have a USB stick with grub4dos on sda1 (vfat), /boot syslinux on sda3 (ext2) and root on sda2 (btrfs). ext2 with syslinux is ...
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338 views

Grub is unable to find physical volume with Windows 7, in dual boot with Archlinux. LDM problem?

When I boot my system I get into the nice menu with Arch-linux, its settings and windows vista (loader) as possibilities. Windows fails to boot when selected with a message identical to the output of ...
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111 views

Grub2 don't see my second HDD

When the new distro is installed it makes grub2 boot menu, but it does not consider my second HDD where I have Windows7. So I tried to edit grubs cfg file but with no success. Also tried to insert ...
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2answers
242 views

How to install a Linux system without affecting previous GRUB?

I have a Linux system for current use and a few other partitions to test different other distros. But the way I install these systems, which is always the same, leads to the GRUB boot list being ...
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1answer
926 views

Unable to boot after installing grub for new Arch Linux Install on Acer S7

I have followed the instructions on the Arch Linux beginner's guide to do a dual boot on an Acer S7-392. I only did not do the initramfs part and I did not create the partitions at the install since I ...