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

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Installing a bootloader on a mac

Due to a somewhat odd requirement for a particular linux installation, with a particular software suite, I found it best to use ddrescue to populate the harddrive with the partitions and their data. ...
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33 views

Windows 10 to blindly write over MBR [on hold]

I dual boot openSUSE 13.2 with Windows 7 because unfortunately I am forced to use Windows for Altium. My Windows box is set to upgrade to Windows 10 any day now, and I am curious how the Microsoft ...
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27 views

How to safely delete a system partition?

I got the following disk sda9 contains a new Linux installation which I'd like to keep, while sda5 is the old installation which I'd like to free (and successively merge with sda4, but we don't ...
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34 views

Grub reboots PC after showing only “Grub loading.”

I have this old computer I use for the more experimental OSes, and about a month ago I installed Gentoo on it, with GRUB2 as boot loader. Everything worked fine, but every boot it would show an error ...
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56 views

Which boot loader is commonly used on Linux distributions and why?

I have been using Ubuntu on my local machine and occasionally running Debian and other Linux distributions for experience. Until recently I thought Grub2 is far common, but that was misleading. While ...
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1answer
24 views

SSD failiure. grub rescue sees files, but I can't mount drives

I have a 2 year old SSD that apparently has died. 2 out of the 3 partitions are completely unmountable (only EFI boot partition mountable). When i turn on my computer I am greeted with grub rescue ...
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1answer
50 views

Permanent grub 2 configuration on debian 8 “jessie” installation on Asus X205TA

I am attempting to run Debian Jessie on an Asus X205TA. I do not have access to internet. I am having difficulty creating additional install media (separate issue). My configuration is as follows: ...
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29 views

grub2: error: /vmlinuz-3.16-ucs109-amd64.efi.signed has invalid signature

I am using a derivative of Debian, called Univention Corporate Server. It's a nice appliance that I use for my home server. Yesterday I upgraded to the newest version and since then my server does not ...
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13 views

How to get the values for “set root” in menuentry while setting password for GRUB2 on CentOS 7

I need to disable single user mode on my servers running CentOS 7. I read the RedHat documentation on what goes to /etc/grub.d/40_custom and how to encrypt the password and all but one details makes ...
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13 views

Boot managers found by os-prober not shown at boot

I've recently made the move from Ubuntu to Arch Linux and could use some help configuring GRUB. When I run grub-mkconfig -o /boot/efi/EFI/GRUB/grub.cfg as per the instructions on the Arch Wiki, the ...
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Is there a different file location for grub2 configuration files on a UEFI system?

One of our old scripts looks in two separate places for the grub.conf file: one "default" and one for UEFI if [ -f /boot/grub/grub.conf ] ; then GRUB_CONF_FILE=/boot/grub/grub.conf elif [ ...
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14 views

Failed to start user service: unknown unit: user@0.service after grub launch

First I have to let you know that I got absolutely no knowledge about linux and need help and explaination like Im 3. So, Im on holidays and I have no live cd with me. I tried to install crome and ...
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1answer
21 views

Booting off raid'ed > 2GB drives, btrfs, handling bios boot partition [duplicate]

Setting up an array of (3) 5GB drives using btrfs. It will soon grow to (6) 5GB drives. Starting with raid 1, will rebalance once all the drives are installed to either raid5, 6, or 10. I will be ...
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3answers
95 views

Which ISO file, vmlinuz and initrd.gz to use for installing CentOS from Multiboot USB?

I have created a multiboot bootable USB with GRUB and used it to install Debian 8.1 successfully. A multiboot USB is one that contains the ISO images of multiple operating systems, with GRUB being ...
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22 views

GRUB: how to change default disk for future OS updates?

I'm running Debian testing on a computer with 2 disks: /dev/sda: /dev/sda1 - data disk /dev/sdb: /dev/sdb1 - Linux Mint (no longer used) /dev/sdb2 - /home /dev/sdb3 - Debian testing (current ...
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43 views

Preinstalled windows 8.1 not booting after installing Linux mint 17.1

I have pre-installed windows 8.1 on my machine and its a uefi enabled machine. I installed linux mint 17.1 on this by the side of windows 8.1. As I was unaware about the approach to install linux ...
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1answer
32 views

Problem with GRUB for dual-boot installation of LMDE 2 (and Windows) on encrypted luks-lvm (truecrypt)

I'm trying to install LMDE 2 'Betsy' 64-Bit dual-booting with Windows 8.1 and both systems encrypted separately, Windows with truecrypt and LMDE with luks. When booting I want to be asked for the ...
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31 views

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
33 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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1answer
90 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
58 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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40 views

Gentoo boots into grub2, “You need to load the kernel first”

I just finished my first Gentoo install and rebooted. I'm taken to GRUB2 and try to boot, it returns error: you need to load the kernel first I tried kernel /vmlinuz But it could not find ...
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18 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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65 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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Initramfs error installing Blackbuntu through Grub

I'm trying to install Blackbuntu through Grub. Once I click the ISO in grub it displays the Blackbuntu loading logo, but then I get this error: Initramfs error: unexpectedly disconnected from boot ...
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25 views

Dual boot Mageia5 using Windows XP bootloader

I used the following commands for dual booting Mageia 5 from Win XP bootloader grub2-mkimage --output=./core.img --format=i386-pc --prefix="(hd1,msdos5)/boot/grub2" biosdisk part_msdos ext2 cat ...
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15 views

Trying to boot Mint via ISO on Drive using a DVD

I use Mint on a Windows PC that I cannot install Grub on. I am trying to figure out how to boot an ISO on the root directory of the C drive (c:\mint.iso) on my Windows PC by running Grub off of the ...
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23 views

Advice Needed for Grub2 Rescue Prompt

When I boot my system, I receive the following Error Message on my screen: error: no such partition. Entering rescue mode... grub rescue> After seeing the error, I plugged in an external USB ...
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35 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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249 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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58 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" ...
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48 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
34 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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1answer
58 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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122 views

I installed Debian 8 on a UEFI laptop, but it isn`t booting

Last time I used linux was a long time ago, Debian six had just been released, and those days I would install it with tranquility in any system. I thought it would be the same now, as I`m on windows ...
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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
42 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
48 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
78 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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214 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
34 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
209 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
40 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
121 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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75 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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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
166 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
28 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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57 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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42 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 ...