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".

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Accidently installed grub to usb

While doing a fresh ubuntu install (dual boot with XP using resize), I somehow managed to install grub to the source usb instead of to the harddrive. Normal harddrive boot goes straight to XP. Booting ...
20
votes
9answers
50k views

Hide GRUB2 menu UNLESS you hold down Shift key: how to make this happen?

I have a Ubuntu - Windows 7 dual-boot set-up, and I would like to have it that my laptop would boot up Windows 7 unless I press down the Shift key right after boot and bring up the Grub2 menu from ...
20
votes
12answers
79k views

How do I hide the GRUB menu showing up in the beginning of boot?

I stopped Dualbooting and I dont want to have to choose the OS anymore and just have it load Ubuntu like normal like before? Any help is appreciated.
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votes
2answers
8k views

Using a bootable live cd disk image mounted on the hard drive

I want to mount the contents of a boot-able CD image, like Ubuntu rescue remix, to a partition of the hard drive. So I can have an entry in Grub to boot to the contents of that disk, ...
4
votes
1answer
9k views

Windows 8 deletes GRUB when booting

I have this situation: SONY VAIO SVF1521V1EB Windows 8 preinstalled in UEFI. I decided to install Ubuntu 13.10 in dual boot. So I downloaded the amd64 iso, burnt on a DVD, then booted from DVD in ...
3
votes
3answers
6k views

Windows 8 installed Ubuntu 12.10 boots straight to Windows 8

I installed Ubuntu 12.10 on my new Windows 8 Dell Inspirin and would like to set up a Dual Boot. However, when I restarted, it just went straight to Windows 8 without giving me a Grub screen with ...
27
votes
5answers
70k views

How do I run update-grub from a LiveCD?

Okay, so I did something stupid. I was trying to clean up my Grub entries, and accidentally removed all of my Linux kernels from Grub (they're still on the hard drive). So now, obviously, Grub ...
25
votes
12answers
50k views

Windows 10 upgrade kills grub and boot-repair doesn't help

I've just upgraded to Windows 10 from Windows 8.1 on my partitioned laptop that has Ubuntu 14.04 installed. Grub no longer appeared on boot so I ran boot-repair from an Ubuntu liveUSB. This didn't ...
4
votes
2answers
580 views

I need my pendrive to boot into Ubuntu, how to correct this and boot from the HDD?

I installed Ubuntu through USB. Instillation was successful. But when I restarted my laptop it didn't boot. So planed install it again when started selected install from USB. it booted my previous ...
78
votes
2answers
71k views

Diskfilter writes are not supported > What triggers this error?

This message occurs when leaving the Grub menu and before the Ubuntu splash screen. How do I fix the problem to clear the message? And what doe is it mean? error: Diskfilter writes are not ...
19
votes
7answers
18k views

How to reboot into Windows from Ubuntu?

I'm looking for a way to reboot into Windows from Ubuntu on a 10.10/Vista dual boot system. The specific use case is that I would like to be able to ssh into my running Ubuntu instance and issue a ...
19
votes
2answers
42k views

How to fix plymouth (splash screen) in all Ubuntu releases!

How to fix black or broken plymouth (splash screen) after installation of nvidia proprietary drivers in Ubuntu (it happens usually in all Ubuntu releases)? It's no matter what version of nvidia ...
13
votes
2answers
1k views

One click shutdown Ubuntu and load into alternative bootup

I have a dual boot system with Ubuntu 11.04 and Windows 7. My GRUB bootloader defaults to Ubuntu. I mainly use Ubuntu, but I occasionally need to bootup Windows to do a few things. If I need to do ...
17
votes
4answers
106k views

How can I edit my Grub bootloader entries (Hide, Rename, Remove)? Preferably doing it manually, and not with a program

So basically I have a pretty flooded Grub bootloader, with older linux versions, 3 operating systems and memtests. What I want is to leave the operating systems only. I need to know how to do it ...
9
votes
2answers
29k views

GRUB does not detect Windows

I have finally installed Ubuntu on my second drive. When I start my computer GRUB only offers me to boot Ubuntu, not Windows 7. What needs to be done so that I can choose between Ubuntu and Windows in ...
18
votes
5answers
249k views

Grub rescue prompt, repair grub [duplicate]

I recently repartitioned my hdd and I have damaged grub on my system. On boot I get the grub rescue prompt and I have to go through the following steps in order to boot normally: set ...
14
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3answers
9k views

How do I install BURG?

I found the source in launchpad for 11.04 and 10.10 but I don't know how to install or compile it.
5
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2answers
32k views

Stuck on GRUB Command Line

I am running Natty Alpha 3. I used Update Manager to install something (not sure what it was), then I restarted, but instead of listing all the kernels, it gave me a command line. I don't know what ...
2
votes
2answers
8k views

Cannot Restore Grub After Windows 8.1 Upgrade

I have an Ubuntu 13.10 and Windows 8 dual-boot working properly, and upgrading to Windows 8.1 breaks grub2 as expected. However, this time boot-repair was not able to bring grub back for me. My laptop ...
9
votes
2answers
21k views

ALERT! /dev/disk/by-uuid/xxxxxxxxx does not exist. Dropping to a shell

I am using Ubuntu 14.04. On 23 August 2014 I ran in terminal sudo apt-get update. Then I rebooted the system. And now I see: ALERT! /dev/disk/by-uuid/xxxxxxxxx does not exist. Dropping to a shell ...
4
votes
3answers
7k views

Multi-partition multi OS bootable USB

I want to create a recovery flash drive. I have my 8 gb flash drive[Kingston data traveller] with me. I also have the required .iso files for a>Ubuntu 13.10 b>Boot-repair disk c>AVG Rescue CD I Wish ...
0
votes
2answers
2k views

UEFI machine doesn't boot Ubuntu through NVRAM bootcatalog. How to fix?

Edit: It currently looks like this Q&A wasn't useful to anybody. I will remove it some time in the future. An answer posted here should: Avoid to require the user to download and ...
27
votes
2answers
21k views

How can I force Ubuntu to boot on a stuck boot menu?

I have Ubuntu Server 11.04, but it is headless (no monitor). The only way I want to be able to access it is remotely via SSH. But, sometimes, say after a power loss, when the server restarts, it will ...
19
votes
6answers
26k views

How to change the purple background color in grub?

How to do this manually, not installing any tools?
19
votes
1answer
37k views

GRUB complains of “no such partition” after installing 12:04

I have just installed 12.04. I previously had 11.10 installed, with /dev/sda6 as the install partition mounted at / and with /dev/sda1 mounted at /home. When installing 12.04, I duly selected the ...
17
votes
6answers
76k views

After update, get “error: file not found.” followed by “grub rescue> _”

I just installed quite a lot of 12.10 updates, was prompted to reboot, and then found that I couldn't boot.
9
votes
4answers
48k views

How to restore Windows 7 MBR without a CD

I have been playing with Ubuntu for a few weeks now, and I'd like to revert my computer back to it's original - factory - defaults. On the computer I have a recovery partition (it's a netbook). I ...
15
votes
5answers
2k views

Is it safe to delete the old kernels from menu.lst? [duplicate]

When the computer starts, GRUB shows a long list of previous kernels in addition to the usual stuff, e.g. Ubuntu 10.10, kernel 2.6.35-23-generic Ubuntu 10.10, kernel 2.6.35-23-generic (recovery mode) ...
9
votes
3answers
72k views

How can I add an entry for Ubuntu to the Windows 7 boot menu?

I have the following setup: first partition is windows 7 partition second partition - ubuntu 12.04 partition while installing ubuntu I installed grub2 bootloader to ubuntu partition mbr contains ...
8
votes
1answer
30k views

Booting Ubuntu Failure : error: attempt to read or write outside of disk 'hd0'

I have installed Ubuntu 12.10 in a Western Digital external hard drive (320GB). This is a complete installation, not a live USB. When I plug it in my HP desktop I go to the BIOS settings and boot off ...
8
votes
3answers
6k views

Ubuntu does not put Fedora into GRUB menu

I have installed a number of operating systems, including Fedora. Most recently I installed Ubuntu, and Ubuntu installed its own version of the GRUB bootloader. However, Fedora does not show up on the ...
4
votes
2answers
36k views

Fix grub2 after installing ubuntu 12.04

I've installed ubuntu 12.04, but after rebooting I get the message: GRUB loading: Welcome to GRUB! error: file '/grub/i386-pc/normal.mod' not found Entering rescue mode... grub rescue> I have ...
2
votes
2answers
924 views

How do I set up multiple HDD?

I got some new hard discs and would like to set my PC up in the following way: Ubuntu is currently installed on one drive I want to put Windows on a second drive I would like a third drive for ...
40
votes
5answers
83k views

How can I show or hide boot messages when Ubuntu starts?

Is there a way to easily turn on/off showing the boot messages (loading the services) when Ubuntu starts? Is it something in Grub2? I am running Lucid.
20
votes
6answers
53k views

How to boot from non-Ubuntu live ISO images like Fedora or CentOS?

I found that it can be done with loopback as follows menuentry "Lucid ISO" { loopback loop (hd0,1)/boot/iso/ubuntu-10.04-desktop-i386.iso linux (loop)/casper/vmlinuz boot=casper ...
28
votes
5answers
9k views

Decrease GRUB timeout

The GRUB timeout is 8 seconds. Can this be turned down to 2 or 3 seconds? What is the best way to do this?
16
votes
6answers
25k views

How do I get my blacked out ttys back? [closed]

Original Question: After I replaced my Ubuntu 10.10 with 11.04 all I get when I Ctrl+Alt+F1–F6 into a tty is a black screen. Also when I boot there's a while of black screen after grub2 menu is ...
20
votes
2answers
22k 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 ...
6
votes
4answers
21k views

Unable to install Ubuntu on Lenovo Y500

I am totally unable to install any flavor of Linux on my lenovo Y500. TL;DR: with EFI on -> cannot even access installer with legacy - > installer runs fine, but installed OS never boots Long ...
20
votes
1answer
93k views

Cannot update grub with paramters on live USB

I have booted from a live USB ("Try Ubuntu"), that also has a persistent option set (I used LiLi to create one) to do some tests for this pcie hotplug issue I'm having. I'm trying to test some boot ...
8
votes
2answers
13k views

Purple start screen - no splash screen

After installing Ubuntu 11.10 on a new computer everything worked fine for a few weeks and now suddenly when starting up Ubuntu I get a blank purple screen with no "Ubuntu" splash and the 5 dots but ...
11
votes
2answers
28k views

GRUB: “invalid arch independent ELF magic” after install on SSD [duplicate]

I've got a brand new laptop with a 128GB SSD drive. I read that aligning the partitions to match the Erase Block Size of the SSD is important. I followed William Scott's guide SSD Tweaks in Linux and ...
4
votes
1answer
844 views

How to prevent Ubuntu from overwriting grub bootloader after update?

Is there any way I can stop Ubuntu from overwriting bootloader? It happens after updating (I suppose) system's kernel. I want to stay with my other linux distro bootloader without having to change ...
1
vote
2answers
3k views

Ubuntu boots to grub rescue

I have two systems installed previously Windows 7 and Ubuntu. I was trying to reinstall Ubuntu and format the Ubuntu OS partition using a tool in Windows 7. When I have Ubuntu ready on a USB stick ...
11
votes
6answers
31k views

Upgrading from 13.10 to 14.04 broke Grub

I have a dual boot Ubuntu + Windows 8 on an UEFI system. Everything was ok until I upgraded to Ubuntu 14.04 from 13.10. Now what I get when I boot the pc is a grub rescue screen like this with the ...
5
votes
5answers
26k views

No Grub after installing Ubuntu beside Windows 7 [duplicate]

Possible Duplicate: How can I repair grub? (How to get Ubuntu back after installing Windows?) I am trying to dual boot Ubuntu 10.10 alongside Windows 7, after install I receive no Grub menu ...
27
votes
3answers
107k views

Failed to get canonical path of /cow

I am trying to install Ubuntu 12.10 for quite some time, and passing hurdles one by one. Now I am in a situation as follows. I have got a PC and 10 GB HDD which will be totally dedicated to Ubuntu so ...
10
votes
2answers
185k views

How do I edit GRUB menu [duplicate]

I have a dual boot on my computer of Windows 7 and Xubuntu 12.10. The Linux boot is 1st and the Windows 2nd. I would like to reverse the boot order in the GRUB menu. I need to know the steps to go ...
3
votes
2answers
13k views

How to disable recovery mode/single user mode?

I am making installation for school computers. I would like to remove single user mode booting, which can make student root user. How to permanently remove single user / recovery mode from GRUB? I am ...
7
votes
1answer
3k views

GRUB2 shows Windows 7 or Windows Recovery Environment instead of Windows 10

This is a Q&A that I recently have figured out, so I have posted the answer below. After installing Windows 10, every time I get a kernel update or I run the update-grub2 it always shows Windows ...