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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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 ...
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 ...
12
votes
2answers
9k views

How do I get a live-USB to use a partition for persistence?

I want to install Ubuntu to a USB hard drive so that it will run on all systems, that can run the LiveCD and store persistent data on a regular ext4 partition rather than a casper-rw file. In every ...
18
votes
11answers
61k 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.
14
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3answers
8k 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
17k 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 ...
5
votes
4answers
27k 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 ...
13
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2answers
2k views

How to remove or hide the GRUB boot menu?

Recently I decided to use only Ubuntu and there is no Windows in my laptop. When I turn on my laptop the GRUB menu is showing but I don't need to choose OS anymore. How can I remove or hide this? ...
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 ...
5
votes
2answers
8k views

Dual boot 12.04/windows 7 After installation my computer reboots straight to Windows. There is no option to boot Ubuntu.

Windows 7 Home Premium Intel i5 2500k CPU ASUSP8Z68-V PRO motherboard GeForce GTX 570 GPU Corsair 120Gb SSD (Windows 7 OS) WD 1 TB HDD I select the USB drive in the BIOS and boot to it ...
23
votes
2answers
18k 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 ...
18
votes
1answer
36k 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 ...
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) ...
4
votes
2answers
34k 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
815 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 ...
0
votes
2answers
759 views

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

An answer posted here should: Avoid to require the user to download and install additional packages or PPAs. Be as quick and simple as possbile. (I tried boot-repair and it didn't ...
62
votes
2answers
48k views

Why this occurs error: Diskfilter writes are not supported

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 ...
17
votes
6answers
14k 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 ...
26
votes
5answers
8k 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?
14
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2answers
28k views

How to fix splash screen in all Ubuntu releases!

How to fix black splash screen or broken 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 ...
32
votes
5answers
69k 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.
18
votes
5answers
219k 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 ...
9
votes
3answers
58k 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 ...
7
votes
2answers
12k 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
26k 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 ...
6
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 ...
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 ...
17
votes
6answers
48k views

How to boot live iso images?

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 ...
18
votes
5answers
23k views

How to change the purple background color in grub?

How to do this manually, not installing any tools?
13
votes
6answers
66k 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
36k 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 ...
5
votes
5answers
24k 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 ...
6
votes
4answers
18k 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 ...
13
votes
4answers
81k 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 ...
8
votes
2answers
147k 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 ...
4
votes
2answers
6k 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, ...
16
votes
1answer
62k 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 ...
5
votes
1answer
12k views

Hide Grub menu and keystroke to reveal

How do you have the grub appear on a key combination, but have windows boot default. I'm running ubuntu 11.10 and grub 2.0. Here is my current /etc/default/grub # If you change this file, run ...
8
votes
1answer
23k 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 ...
4
votes
2answers
819 views

Dual boot ubuntu 11.04 and fedora 15

I want make dual boot with feodra 15 and ubuntu 11.04 for testing features,please guide me the same. i had done dual boot with windows and linux but not linux linux.
3
votes
2answers
10k 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 ...
4
votes
3answers
5k 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 ...
6
votes
2answers
13k 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 ...
5
votes
3answers
6k views

“/etc/grub.d/README: 6: Syntax error: ”(“ unexpected” while upgrading grub package

I am facing a problem while installing any program. I get an error of Sub-process /usr/bin/dpkg returned an error code (1). Following is log of the output of apt-get -f install. Any idea what's wrong ...
3
votes
1answer
9k views

My ubuntu partition was deleted and I can't boot from either a DVD or USB

It's my first time installing ubuntu. I have Windows 7 and 8 before in my laptop (Acer Aspire 4752z). After Ubuntu (12.04) installed in my laptop, the Windows boot loader didn't recognize my Ubuntu so ...
18
votes
2answers
4k views

How can I see what happens during the boot process?

On my machine booting takes more than a minute which is annoying when I see that Windows 7 boots in 20 seconds. Here is what I get when the machine is booting. How can I see what happens when ...
16
votes
6answers
22k 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 ...
11
votes
6answers
30k 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
18k views

How to use NVIDIA GTX 970 GPU? [duplicate]

I have NVIDIA GTX 970 GPU, which is pretty new chip and it is not recognized by nouveau driver shipped with Ubuntu 14.10, hence I am stuck on 1024x768 resolution on Full HD monitor - not so good. ...
5
votes
1answer
6k views

Install Ubuntu from iso file using grub2

I have previous versions of Ubuntu, which includes grub2. I see on the Internet that, grub2 can boot from iso file, So, I booted Ubuntu from iso file, But whenever I tried to install, it gives an ...