GRUB2 is the next generation of the GRand Unified Bootloader (GRUB). Ubuntu has used GRUB2 as the boot loader since 9.10 (Karmic Koala). Commonly referred to as simply "GRUB".

learn more… | top users | synonyms (2)

0
votes
0answers
9 views

Store LiveUSB settings/apps on hard drive?

I have a 64GB LiveUSB I am using to write this message right now. I am using it because GRUB won't install on my 2TB SSHD, and my primary HDD won't boot, either. I want to make my ...
0
votes
0answers
6 views

Boot Disk Locked up, no permission to see the content

I have Ubuntu 15.10 on my laptop. I leave it on all the time, and this morning, while I wasn't using it, flash installed on my system, and my boot partition was completely filled up. Also, firefox ...
3
votes
2answers
7k views

Grub rescue in new installation invalid arch-dependent ELF magic

I installed ubuntu over a W8 installation (my objective was that only ubuntu remains), the installation completed well and ask to reboot, after that, it only gives me a black screen and grub ...
0
votes
1answer
33 views

Customizing Grub 2 Menu

I'm trying to customize the Grub 2 menu. I have Win 10, Ubuntu, Win 7, Win 95, Win XP on my hard drive. The Grub Bootloader can see Win 10, Win 7, and Ubuntu. It does not see the other 2 operating ...
1
vote
1answer
179 views

Ubuntu bootx64.efi not detect grub.cfg file on NTFS partition

First, I'm sorry for my poor English. I'm a Windows user and new with grub2 also Linux. So I came here to get some advice from you. I'm running windows 10 UEFI and now I want to use grub2 is main ...
0
votes
1answer
506 views

How can I set up Ubuntu Server 16.04 to load a GUI on demand?

I would like my server to boot to command line by default but load a GUI when I need one. I have a virtual machine set up just for testing and I got the standard UNITY GUI installed on it no problem. ...
0
votes
0answers
23 views

Black screen while installing Ubuntu 14.0.04 LTS on Hp pavilion 13 laptop with pre-installed windows 8.1 (UEFI ) and GPT partition hard-drive

I have browsed through many similar topics in numerous forums. I couldn’t find any satisfying solution so I have decided to post this problem here. I have following configuration: Hp pavilion 13 ...
0
votes
0answers
25 views

stuck in grub rescue on ubuntu 15.10

My problem started after running "delete MBR" from tesdisk at terminal, then rebooting and all I get black screen with: "error Entering rescue mode... grub rescue>" I've tried some tutorials kind of ...
0
votes
0answers
89 views

16.04, Windows 10 boot

Can't boot into windows. Legacy support, UEFI off, Fastboot off. Grub entry: insmod part_gpt insmod ntfs set root='hd0,gpt3' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy ...
0
votes
0answers
27 views

GNU GRAB version 2.02 + Keyboard does not work

GNU GRUB Version 2.02~ beta 2-36ubuntu3 Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file ...
47
votes
4answers
181k views

How do I boot into single-user mode from GRUB?

After changing a few lines in xorg.conf, I can no longer boot Ubuntu (I assume it breaks when trying to load up X), so I need a way to boot into a single-user mode. However, there seems to be zero ...
-1
votes
0answers
22 views

Unable to Install Windows 10 (Couldnt find boot disk) - Suspect previous Linux Install

I've finally decided to switch to Windows 10 from Windows 7, but I encountered an error along the way that I can't seem to google the fix for. A little preface: Before this, I was dual-booting linux ...
0
votes
0answers
15 views

Android kernel must load after booting in virtual box (lubuntu 16.04)

I dont know GNU GRUB version 0.9.7 after create fake sd card. I dont know.Formate in extr3 and after after installation I had no problem. will not let me download music, games, video if it is not ...
0
votes
2answers
33 views

Can't use Ubuntu 14.04

I installed ubuntu 14.04 on my machine but unfortunately I can't use it ! At first, I had this famous error : error: line '/grub/i386-pc/normal.mod' not found I looked on the Internet and I found ...
0
votes
2answers
4k views

Recovering GRUB after installing Windows 7 with boot repair

Recently I've reinstalled the Windows copy I had alongside Ubuntu, and after that the GRUB menu disappeared and the computer starts off on Windows automatically. The solution I found was to run boot ...
0
votes
1answer
35 views

Windows Ubuntu dual boot - Windows boot problem after updates

My Windows - Ubuntu dual boot system was working perfect for up to 6 months. After Windows updates, Windows can't boot. I have tried several things but nothing seems to work. You can find a Boot ...
0
votes
2answers
535 views

Grub menu at boot time… “holding shift” not working

I read here at this thread that holding Shift during boot can bring up the GRUB menu. However I try holding one or the other Shift keys, tapping, tapping then holding, nothing works. Am I missing ...
0
votes
3answers
1k views

Can't boot: “mdadm: CREATE group disk not found”

After running apt-get upgrade yesterday and shutting down, I'm no longer able to boot Ubuntu 15. The last several lines I see during boot are: Begin: Running /scripts/init-premount ... done. Begin: ...
6
votes
3answers
149 views

How to safely change OS name in grub boot menu?

I have a system where I am dual-booting Ubuntu GNOME 15.10 and Ubuntu GNOME 16.04, however after installing Ubuntu GNOME 16.04, I have found that in the GRUB boot entry list it is called "Ubuntu", ...
3
votes
3answers
842 views

Grub wait time 10 seconds after editing to “0” in /etc/default/grub?

Using all of the solutions described on this site, setting the Grub menu wait time to zero does not work. I did the following: sudo cp /etc/default/grub /etc/default/grub.old sudo gedit ...
3
votes
1answer
6k views

What location to put bootloader, when running multiple drives and partition

I have Win8 on my desktop, where a 120G SSD is used to run windows and some select applications, while I have a 2TB HDD to provide basic file storage and where possible, install applications instead ...
0
votes
1answer
287 views

How to install and launch grub-customizer through the GUI?

I have always been a windows user. Thought I would try kubuntu to see how I liked it. I would like to make windows my default, so I downloaded grub-customizer to reset the boot. I really do not ...
0
votes
1answer
35 views

Grub black screen on external hdd

I have a HP Pavilion dv6 laptop with HD Radeon and with W7 preinstalled in a internal hdd. I try to install ubuntu in a external hdd, but the Grub don't load, only appear a black screen and i only ...
29
votes
6answers
379k views

How to fix "error: unknown filesystem. grub rescue> [duplicate]

I get this error: Error: unknown filesystem. grub rescue> I'm not exactly sure what I did. I believe I installed Ubuntu over Windows on my Acer netbook. I then tried to install Linux Mint, but ...
3
votes
1answer
85 views

Dual booting (Ubuntu over Windows) directly to Windows 10

Problem Case: Dual booting with Ubuntu (efi/gpt scheme) over Windows (efi/gpt scheme) and My HP pavilion is booting directly to Windows 10. Details: Previously installed Windows 10 with UEFI, fast ...
0
votes
3answers
46 views

dual boot system can't boot from usb

I have Ubuntu 15.10 and Windows 8.1 both installed on my PC and I want to boot from a USB just to check something, but GRUB does not give me any option to do so. The USB is bootable (I checked it with ...
0
votes
1answer
28 views

How to reinstall grub by ubuntu 14.04 live CD?

How to reinstall grub by ubuntu 14.04 live CD? Could you show me the installed steps? Thanks. Regards, David
1
vote
1answer
6k views

how to add windows 8 entry to grub after boot-repair

I installed ubuntu 14.04 in a dual boot (with windows 8.1) but my pc directly boots into ubuntu. For that I did a boot-repair->recommended repair. But all I got was grub menu with an option to boot to ...
1
vote
1answer
24 views

How to install grub Ubuntu 14.04?

I installed Windows8.1 and Ubuntu 14.04 but when boot up its only take Ubuntu not take Windows. I also try this sudo apt-get install grub. Its not take.
0
votes
0answers
11 views

Making grub read from a GPIO pin, AMD processor [closed]

I'm trying to find out how to read a gpio pin of my AMD processor, whether I can use memrw or iorw modules. If so I'm wondering how do I do that? would it be some scripting on grub.cfg or something ...
0
votes
0answers
14 views

grub doesnot show windows 10

Whenever I boot into system, Linux directly boots. On pressing shift, grub shows only Linux, not windows. Here are results of fdisk and update-grub. I think I have installed Linux the wrong way. plz ...
1
vote
2answers
460 views

rescue Grub problem 12.04

I have a problem with starting Ubuntu 12.04lts in a system which has a Windows 7 beside. the grub cannot load and we see a massage which announces there is a problem with grub and there is a line like ...
0
votes
1answer
33 views

rescue grub not working

So in the middle of formating one of my drivers battery died and after starting the laptop i got rescue grub . i tried all the hd partions with ls and none of them has the boot/grub in them. Using ls ...
0
votes
2answers
2k views

Fixing grub rescue

I removed the ubuntu partition from windows and extended the volume to a existing windows partition. Earlier I had a dual boot windows and ubuntu. Now it shows me the grub rescue. grub rescue>ls ...
1
vote
1answer
39 views

ubuntu installation using preseed

I'm trying to do the unattended ubuntu installation using preseed.cfg. I am following the instruction as in ...
0
votes
0answers
191 views

Black screen of death after grub

I have an hp laptop with an intel chipset. I have been using Ubuntu 15.10 and it has been working great. One day i ran an update but now when i boot the machine the screen is completely black. I get ...
2
votes
3answers
2k views

`install-grub` claims that I have multiple partiton labels and that embedding is impossible

I am trying to get GRUB installed on my non-booting desktop computer, but I am encountering several errors. Other sources discussing these errors have ascribed them to either a lack of free disk space ...
22
votes
2answers
27k views

How do I customize the GRUB 2 menu?

This is what my GRUB 2 menu looks like so far: I want to do a few things here: I want to rename "Windows Boot Manager (on /dev/sda1)" to just "Windows 8.1". I'd like to rename "Ubuntu" to ...
2
votes
1answer
37 views

Ubuntu 14.04 only boots with USB stick

My Ubuntu screen turns black after boot up, unless I insert the "live" USB in the PC before booting up. I have tried different distros, USB sticks and computers and they all have the same issue. Do ...
0
votes
1answer
4k views

Boot .efi files from GRUB2

I've bought a Sony VAIO with UEFI booting and came with Windows 8 preinstalled. I successfully installed Ubuntu 13.10 and Windows 7 (triple-boot) and fixed the UEFI boot so GRUB2 is loading. I was ...
0
votes
1answer
26 views

Error: Unknown Filesystem [closed]

I have installed ubuntu and windows, but yesterday I merged partition on windows. So now it has noticed this problem: “error: unknown filesystem”. When I start my PC I write this code: set ...
1
vote
1answer
5k views

Formatted Partition and now I have Grub Rescue Error

I done goofed. I decided that I really didn't need Ubuntu anymore (and that I wanted to give Mint a try) so instead of doing a smart thing I went ahead and wiped the partition that Linux was running ...
0
votes
0answers
16 views

Grub Installation failed into target

I tried to install Ubuntu 14.04 on Windows 10 having created partitions for swap area and root. But when I am installing ubuntu it keeps saying "failed to install grub-efi-amd64-signed" into target. I ...
0
votes
1answer
31 views

GRUB shows Windows recovery instead of normal Windows

I just installed win10 + ubuntu on my Lenovo laptop. Windows is installed on SSD and Ubuntu is installed on HDD. sda1 is win recovery and sda2 is windows 10. Ubuntu is installed on sdb. Bootloader was ...
5
votes
2answers
442 views

How do I install two independent Ubuntu installations on a single hard drive with UEFI?

For security reasons I would like to install a secondary completely independent operating system on a single-hard-drive computer using UEFI. Both installations should be able using different LUKS ...
1
vote
0answers
17 views

Windows appears to be booting from recovery partition, but everything is fine?

This is not a problem, but rather a mystery. I am dual-booting windows 7 and Ubuntu 14.04.4. Grub is clearly pointing to a windows boot loader on my recovery partition. It says something like ...
0
votes
0answers
23 views

Grub Error when trying to boot into windows

When i try to boot into windows boot loader from grub, it gives me an error that it can't run the boot loader. Windows works fine however if i run it from windows boot loader. From the windows boot ...
1
vote
1answer
7k views

How do I get into recovery mode on ubuntu 14.04 if the option not showing

I just boot up my laptop then run the sudo apt-get update command, but there's an error says: [username] is not in the sudoers file. This incident will be reported. so I search the google ...
0
votes
0answers
10 views

GRUB2 Background image - random

I have successfully changed the GRUB2 background image in my 14.04 installation. I change the pictures statically based on the season. Can the background image be randomised programatically ? This ...
0
votes
0answers
197 views

14.04.3 LTS tries to install bootloader to its own installation media, and how I fixed it

I tried installing Ubuntu Desktop and Ubuntu Server 14.04.3 LTS using the standard text-based install. It kept saying, "Executing 'grub-install /dev/sda' failed. This is a fatal error." The alt+f4 ...