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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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 ...
22
votes
4answers
46k 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 ...
26
votes
5answers
7k 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?
17
votes
1answer
34k 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 ...
20
votes
2answers
13k 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 ...
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 ...
14
votes
5answers
2k views

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

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) ...
7
votes
2answers
11k 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
24k 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
5k 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 ...
33
votes
2answers
21k 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 ...
16
votes
6answers
11k 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 ...
27
votes
5answers
59k 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.
7
votes
4answers
26k 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 ...
12
votes
6answers
56k 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.
5
votes
5answers
22k 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
16k 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 ...
8
votes
3answers
48k 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 ...
4
votes
2answers
5k 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, ...
12
votes
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? ...
8
votes
1answer
18k 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
20k views

“invalid EFI file path” while booting Windows [closed]

I just got my new working notebook with Windows 8 pre-installed. After installing Ubuntu 12.10 the grub menu says that there is an "invalid EFI file path" and it won't boot Windows. Ubuntu works ...
5
votes
1answer
11k 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 ...
3
votes
2answers
8k 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 ...
5
votes
2answers
6k 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 ...
4
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
8k 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 ...
1
vote
2answers
691 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 ...
1
vote
2answers
2k 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 ...
15
votes
6answers
42k 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
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 ...
8
votes
2answers
6k 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 ...
14
votes
6answers
18k 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 ...
10
votes
4answers
65k 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 ...
4
votes
1answer
5k 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 ...
15
votes
11answers
48k 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.
5
votes
1answer
4k views

No sound and flash videos play super fast after daily update

I just updated my 11.10 Ubuntu from the regular auto updater. After I restarted my laptop I have no sound and the videos in YouTube (and other websites) play super fast. Not sure if it has something ...
6
votes
6answers
18k views

Change boot entry names and grub background?

How do i change the names of the boot entries and the background of the boot menu?
5
votes
2answers
3k views

Out Of disk, but still boots

I have a HP Compaq nx6310 notebook wth 4gb memory & a new 250gb hdd. After installing Ubuntu 12.04, i got an "out of disk" error & was unable to boot. I rebooted in live, instaled & ran ...
6
votes
1answer
1k views

Fresh install won't boot throwing “error: end of disk”

I have a machine which is supposed to be a media server. I have tried to install Ubuntu (both alternate and regular i386). The installation (and boot to usb drive) went on fine, but after the install ...
4
votes
2answers
54k views

How do you run update-grub?

I went into Live CD and activated Terminal. Then, I typed gksu nautilus to gain temporary access to my root directory. Once the Manager window opened, I clicked on File System and navigated to the ...
0
votes
1answer
6k views

Bootloader Problems Grub Won't Load Windows 7

I sent this to boot.repair@gmail.com, still no response thought I could get a faster solution here. I am running Windows 7 64-bit and Ubuntu 12.04 LTS on separate partitions. The message is sent is: ...
25
votes
0answers
4k views

How to remove the unwanted entries from the boot menu? [duplicate]

Possible Duplicate: Is there a way to remove/hide old kernel versions? When my system boots up, a big list of some 6 options are shown other than the Windows OS option. They are like : ...
3
votes
2answers
5k views

How to restore plymouth default theme

I'm a newbie and I've got this issue: My system has set up debian_5 theme but I want to get rid of it and restore the Ubuntu 11.10 default grub theme/splash/design (as you prefer) that is I think ...
3
votes
2answers
2k views

How do I restore grub after I ran a fixmbr command?

I have deleted a partition which had an incomplete ubuntu install using Windows 7 partition manager. Other than that I had a different partition with a working ubuntu but when I deleted the partition ...
1
vote
1answer
13k views

GNU GRUB version 1.99-21ubuntu3, DOES NOT WORK! [duplicate]

Possible Duplicate: How can I repair grub? (How to get Ubuntu back after installing Windows?) I'm new to Ubuntu, I installed it but when I try to start it, tells me that I need to run ...
1
vote
2answers
19k views

Add windows to my boot menu

I have windows installed on /dev/sda3 and running Ubuntu 11.10 on /dev/sda5. The boot loader points to /dev/sda1 and /dev/sda2. Both are parts of the recovery system for my laptop. How do I edit the ...
17
votes
5answers
20k views

How to change the purple background color in grub?

How to do this manually, not installing any tools?
11
votes
6answers
27k 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 ...
13
votes
0answers
21k views

How do I boot into console mode? [duplicate]

In previous versions of Ubuntu I could get the computer to boot into console mode by setting the variable GRUB_CMDLINE_LINUX_DEFAULT to "text" in the file /etc/default/grub and run sudo update-grub. ...