Grub2 is Grub version 2, a multiboot bootloader from the GNU project.

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Places or books to start learning PXE booting [closed]

I am currently playing around with PXE booting and PXELINUX/SYSLINUX. I have tried LTSP , thinmachine, FOG project and some others. Currently I am trying to understand how PXELINUX is working under ...
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47 views

Where to find docs about multiboot2 cmd in grub2?

GNU docs almost nothing about multiboot2 command (although I could find linux, boot commands in the 14.3 The list of command-line and menu entry commands section), and enter link description here ...
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213 views

Grub2 error after installing Elementary OS Freya on Dell laptop

I am using Windows 10 on Dell Inspiron 15 (laptop). I downloaded OS Freya (Latest Stable Version) Probably 3rd version and created a bootable USB using Rufus. I made 100 GB space free on my HDD, which ...
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493 views

(sda) Assuming drive cache: write through hang on boot

I just install CentOS 7 on VMware EXSi 6.0 with encryption. and after the configuration and boot i got it hang with message: [sda] Assuming drive cache: write through I did search on Internet and ...
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126 views

Debian Jessie with dmraid

So I'm having issues, I have the following... Windows 8.1 on RAID0 SSD 2 3TB WD Reds NTFS Formatted 2x WD Raptors RAID0 I want to install Debian on the 2x WD Raptors on the INTEL Raid. I can do this ...
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104 views

ASUS logo and GRUB not showing up on PC boot

When I start the PC monitor, it goes into power saving mode resulting in the ASUS logo not showing up. Even the GRUB GUI, which I use to select between Windows 8.1 and Ubuntu 14.04, isn't showing up ...
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35 views

How to boot to USB using grub

My computer currently boots to grub2 at the moment. I have an Ubuntu iso installation on my USB. How can I make grub boot to my USB? The way I'm used to doing it is like so: When on Windows 8.1 ...
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Problems with Grub - Ubuntu error while installing alongside Windows

I tried installing Ubuntu alongside Windows. I did this using a bootable USB with Ubuntu LTS and using the "install alongside Windows" option. Unfortunately there was FATAL error and now when I boot ...
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22 views

What are the correct permissions for grub.cfg?

I'm wondering which user(s) should have access to grub.cfg and what the permissions should be for grub.cfg.
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146 views

Windows hybrid sleep/hibernate not working when booting from GRUB

So I have a multi-boot system setup (each system is installed on its own hard drive) and I can't seem to put my Windows 7 install into hybrid sleep/hibernation if I load it via GRUB. Whenever I click ...
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336 views

windows 7 build 7601 this copy of windows is not genuine

I'm getting this issue with almost every window I try to open just doing nothing or returning some nondescript or unhelpful error message (such as Invalid Interface). And windows tells me I'm on a ...
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33 views

Does GRUB actually install an MBR?

I’m wondering if I need to use some other utility to actually write the MBR to disk, or if GRUB writes an actual MBR to disk? The wording in the GRUB2 documentation is not entirely clear on the point....
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145 views

Boot Windows directly through Grub2

I have an UEFI multi-boot system with Windows 7, Windows 10 and OpenSUSE. Currently when I want to boot Windows, I first need to select Windows Boot Manager in Grub2, it then chainloads the Windows ...
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74 views

CentOS 7.1 updating GRUB Menu to show aditional os

I am runing CentOS Linux release 7.1.1503 (Core) as my primary OS and have also installed openSUSE 13.2 but I am having some problems with updating the the GRUB menu so that I can launch openSUSE as ...
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348 views

Changing GRUB_TIMEOUT value doesn’t seem to work

Yes, I did do sudo update-grub. Changing the /etc/default/grub GRUB_TIMEOUT variable seems to work once, but then after that first time every time I reboot the timeout is 30 seconds and my time I set ...
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221 views

This arch install not yet working, /sbin/init trouble

I do an lvm2 arch install, as the installation page on the wiki tells. I do what the wiki page tells, with the mileage: put Grub as boot manager. Set the lvm2 hook on the mkinitcpio configuration. ...
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132 views

Trying to get back to Win 7 after deleting Ubuntu 15.04. Can't get past “grub rescue >”

I wanted to go back to an all Windows machine after trying Ubuntu 15.04. It was a good experiment, but not for me. I had installed Ubuntu 15.04 on its own partition and it put in a dual boot menu. At ...
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105 views

grub2 freedos attach virtual floppy disk

I'm interested in loading freedos under grub2 and easily loading in new bios/dos utilities without having to re-generate a new freedos image everytime. The aim being to have a folder on the disk ...
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104 views

GRUB2 not seeing hard drives after reboot

I have three hard drives installed: /dev/sda1: LABEL="Wiederherstellung" UUID="044AE97A4AE9693E" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="549b8c2d-7c9a-45b4-8de2-e4177da085ea" ...
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5k views

grub rescue mode on kali linux (usb flash)

Trying to create Kali Linux live USB persistance. Split the usb like this: || first part FAT for data || second part FAT for LINUX || third part for persistance|| Then set "bootable" flag in gparted ...
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1answer
58 views

Why does grub2 boot menu show abnormally like this?

My distribution is Fedora 22. The grub2 boot menu screen is obviously wrong. How to make it show in full screen? Thanks in advance. PS. My display's default resolution is 1920x1080. When I logged ...
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134 views

GRUB2 multi-boot with one boot partition

i'm trying to make a multi-boot disk (5 linux distros) with only one /boot partition. Problem is that the guy before me that made this disk didn't bother to create that separate boot partition, so i ...
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303 views

Execute setpci at boot

I'm using grub to execute two setpci commands when starting Arch on my MBA. These commands solve "startx black screen" issue for me: setpci -s "00:17.0" 3e.b=8 setpci -s "02:00.0" 04.b=7 Now I want ...
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203 views

Computer won't boot into any OS

The title may seem vague, but I've tried so many things that I'm not even sure what to label the issue as. I got a new PC so stored my old PC parts away. I then got a new case so thought I'd put ...
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436 views

install mint linux alongside ubuntu on lvm with EFI boot

I have recently moved to a new laptop (Lenovo Y50) and installed Ubunt 15.04 on it. I installed lvm so almost all the 1T HD is one logical partition. The other partitions are: eyal@eyal-Lenovo-Y50-70:...
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Windows 10 / Linux Dual Boot - Boot-loader Problems

I am currently running a dual boot of Windows 10 Home 64-bit and Xubuntu 15.04 64-bit on my machine. I have Windows 10 on an SSD, Xubuntu on another SSD and an HDD for storage formatted as NTFS (this ...
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1answer
338 views

Windows 10 crashes after about 3 minutes with Ubuntu 14.04 installed

I have Ubuntu 14.04 installed on my machine on a partition. I wanted to install Windows 10, so I installed it to another partition using a USB. Later there was the issue where I could not select the ...
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140 views

How to avoid boot failure after upgrade from Windows 7 to Windows 10 with dual boot

Basically, I want to avoid this: http://askubuntu.com/questions/654386/windows-10-upgrade-lead-into-grub-rescue My current disk partitioning scheme looks like this Model: ATA ST1000DM003-9YN1 (scsi) ...
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Installing 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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12 views

Booting USB with LiveCD GRUB

Under VMWare Player, I cannot boot directly Ubuntu 14 from an USB drive, so I would like to start with the LiveCD and boot from GRUB, issuing a custom command. Is that possible? What should be the ...
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363 views

Windows-Linux multi-boot problems in case of upgrade from Windows 7 to Windows 10?

I use Windows 7 on a multiple-boot machine (beside Win7, I have different Linuxes, using Grub). I want to freely upgrade Windows 7 to Windows 10. Will the procedure have some impact on the multi-...
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46 views

Boot from mass storage in GRUB2 error

So I want to install a new system using liveUSB. However the .iso file is avout 5.5GB big and the only thing that can handle such capacity is my SD Card (16 GB, pendrives are only 4 GB). I've made the ...
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Changing SATA speed on HP Probook 6560b with Transcend SSD370

I have an HP Probook 6560b with updated BIOS version F.60 Rev.A (31 Mar 2015) and a Transcend SSD370 256GB SATA 3 SSD. On that I run Debian 8.1 with grub2 (not grub-efi). The default setting in BIOS ...
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195 views

Failing to boot after disk cloning

I had the following configuration of partitions on old 160GB disk: /sda /sda1 - 100MB - NTFS - System Recovery (hidden Windows partition) /sda2 - 75GB - NTFS - Windows /sda3 - extended ...
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How can an OS change the boot order?

On a machine that uses UEFI and GRUB to boot I've witnessed Windows decide to change the boot order. I thought boot order was only the business of me and my motherboard and simply non-existent in the ...
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259 views

Grub2 on msdos table partition won't load

my laptop has: 500gb hdd /dev/sda 22gb sdd /dev/sdb I used to boot archlinux from a small ext2 partition on /dev/sda. The bios is set to use BIOS mode (not uefi), secure boot is disabled, AHCI is ...
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90 views

Win XP, Win 8 and Linux in Grub2

For the following setup: kellogs@kellogs-PC:~ > sudo fdisk -l [sudo] password for kellogs: omitting empty partition (5) Disk /dev/sda: 160.0 GB, 160040803840 bytes 255 heads, 63 sectors/track, ...
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257 views

Can I safely convert my disk to GPT using diskpart with GRUB 2 installed?

I am wondering whether I would be able to convert my disk 0 (with my system partition, Windows partition, and Ubuntu partitions) from an MBR to GPT disk without loss of data and still being able to ...
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116 views

Grub2 immediately boots into Linux

OpenSuSE 13.2, running grub2. SHORT VERSION: Yesterday I had a normal grub2 boot menu and could choose to boot (successfully) into Linux or Windows. Today, I see the grub2 header displayed for a ...
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GRUB 2 stops dual booting Windows 8

I own a laptop with two hard disks. Windows 8.1 is installed in UEFI mode on the first disk, and I recently installed Gentoo on the second one. Now I want to be able to select the OS on boot in GRUB2 ...
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67 views

Minimal linux USB with Grub

I've been using this site for quite a long time now, and today I have a question for you. I have several PCs with dualboot between windows and Linux, and recently after upgrading one to windows 10 my ...
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1answer
665 views

Grub rescue command line, chainloading Windows 7 installer

I currently have grub2 installed on a Baytrail tablet along with Ubuntu 14.10 (64-bit) and Windows 8.1 (32-bit). The tablet comes with 32-bit UEFI only firmware, and a 64-bit atom processor. Using ...
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1answer
212 views

Windows XP missing hal.dll error after installing Ubuntu

EDIT: The problem is due partitioning, most of the following might've not influenced the outcome. I was dual-booting and I wanted to make some unspecified partition space and I've decided I didn't ...
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105 views

Unchaining grub2 and windows bootloader(s)

I would like to find out if it is possible to unchain grub2 and windows boot-loader and I could not find a convincing answer anywhere, perhaps it is just not possible... The situation is as follows: ...
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158 views

Invalid partition table

Before getting this "invalid partition table!" warning, I successfully installed Debian and Ubuntu side by side. No problem, no boot warning, no mess with grub, everything ok. But yesterday I decided ...
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Windows 7 screen not displayed after installing Ubuntu

I bought a new Lenovo laptop with DOS and I wanted to make it dual boot (Ubuntu 14.04 and Windows 7, both 64 bit). I took the following steps to install both systems: Installed Windows 7 OS ...
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1answer
823 views

grub-update and “/usr/sbin/grub-probe: error: unknown filesystem”

I've got a Debian 7 Wheezy (stable release) and my GRUB suddenly refuses to see one of my partitions. It is an OS X HFS+ partition on the GPT disk. This behavior was introduced in the month or so and ...
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43 views

Trying to Fix MBR

I first decided that I wouldn't need Windows anymore, so I deleted it when I installed Ubuntu (I realized how wrong I was: no visual studio nor texnic center). Now I tried getting Windows back, so I ...
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107 views

Can't access Windows after linux mint update

I have a dual boot system with Windows 7 and linux mint. I recently updated my mint distro by installing the new version (in the process eliminating the older version.) I can now use linux mint fine ...
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113 views

Which partition manager to use for dual-boot Windows, Linux on SSD? [closed]

I have Windows 8.1 and Linux Mint dual boot (Grub) on an SSD disk. I want to resize Windows partition to take less space and give it to Linux. I don't want to mess up my computer, so I wanted to ask ...