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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What does the kernel boot parameter “set acpi_osi=Linux” do?

I am facing an issue with brightness control in my laptop which has Intel HD graphics. So when I searched for a fix I found that a common suggestion is to edit the GRUB file line, ...
14
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2answers
37k views

How can I change/convert a Ubuntu MBR drive to a GPT, and make Ubuntu boot from EFI?

I recently have upgraded my PC, my new Motherboard (ASUS M5A99X EVO) uses UEFi instead of the regular MBR option. I have a Ubuntu 11.10 installation that I did when I had my previous hardware (MSI MS ...
15
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6answers
8k 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 ...
21
votes
5answers
94k views

I can't get grub menu to show up during boot

After trying (and failing) to install better ATI drivers in 11.10, I've somehow lost my grub menu at boot time. The screen does change to the familiar purple colour, but instead of a list of boot ...
8
votes
7answers
22k 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 ...
8
votes
4answers
48k views

I receive the error 'grub-install /dev/sda failed' while attempting to install Ubuntu as the computer's only OS.

I am attempting to install Ubuntu on a box which was previously running Windows 7. I have also experienced the dreaded "Unable to install GRUB" error. I am not attempting to dual boot. I have ...
11
votes
1answer
16k views

Editing the default boot item in grub menu, a definitive answer?

Each time I've tried to dual boot Ubuntu with Windows I always have difficulty with the same thing... editing the default option on the grub boot loader. I'm now running 11.10 and have run into the ...
4
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2answers
4k views

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

So in essence I want to mount the contents of a bootable 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, ...
3
votes
1answer
4k 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 ...
6
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6answers
13k 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?
6
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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 ...
3
votes
1answer
7k 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 ...
25
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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 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 ...
3
votes
2answers
4k 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
11k 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 ...
15
votes
5answers
16k views

How to change the purple background color in grub?

How to do this manually, not installing any tools?
32
votes
3answers
48k views

How to get to the GRUB menu at boot-time, on a single-boot system (not dual-boot)?

This issue came up recently for me (and I've been prompted to lodge it as a specific question about it): My system is not dual-boot, I run a standard Ubuntu desktop system "on the metal" (I think ...
13
votes
2answers
866 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 ...
6
votes
4answers
18k 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 ...
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. ...
5
votes
4answers
12k 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 ...
2
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2answers
18k views

Grub not showing on startup for Windows 8.1 Ubuntu 13.10 Dual boot

Ok, so I'm such a newbie to Ubuntu and I bought a Windows 8 pre-installed laptop last month. I updated to Windows 8.1 and then I thought about installing Ubuntu as a dual boot so I could mess around ...
1
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2answers
1k views

Server stuck at black screen after reboot

I recently put together a new server running Ubuntu Server 11.10 and it's all working great except for one little detail. Whenever I run "sudo reboot" everything works fine until I get to the grub ...
9
votes
4answers
32k 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
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4answers
47k 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 ...
2
votes
3answers
7k views

Manually install GRUB

I have the latest Puppy Linux (5.20, I think) but it has a problem with grub install at the end of the setup process. How can I install grub (or grub2, the easiest one will be great) manually using ...
4
votes
3answers
2k views

How can I get GRUB to appear after installing Ubuntu with Windows 7 using a LiveUSB?

I booted Ubuntu 12.04 LTS from a LiveUSB, and then selected the option to Install Ubuntu to my hard drive. I allowed the installer to partition it, giving Ubuntu 50GB and leaving Windows 7 with 200GB. ...
4
votes
2answers
1k views

How do I fix grub so that it shows up during boot?

I installed ubuntu alongside windows but grub wont show during boot and windows starts instead. I used a liveCD and followed these instructions https://help.ubuntu.com/community/Boot-Repair But ...
4
votes
2answers
9k views

How to always show the menu in GRUB2?

Installing Ubuntu 10.10 I get the GRUB2 boot manager. By default is does instant booting of the first entry, i.e. you have to hold the Shift key while booting when you want to enter the menu. How ...
3
votes
2answers
775 views

How can I re-instate my admin privileges?

I am running 12.04 LTS. It's a pretty default installation and is the only OS on this machine. I have two users one has administrator rights the other does not. I accidentally removed administrator ...
0
votes
3answers
3k views

What to do when I get an “attempt to read or write outside of disk 'hd0'” error and Boot Repair does not solve the problem?

I tried to install Xbuntu 13.10 on an older computer. I noticed some difficulties during installation that may be relevant to my problems. Notably: The screen resolution was extremely low. The ...
0
votes
1answer
3k views

Ubuntu 13.10 Grub 2.0

I know this question may have been asked hundreds of times before but there doesn't seem to be one answer to how to solve it. I upgraded my computer to Ubuntu 13.10 and my computer was low on ...
0
votes
1answer
2k views

Installing Ubuntu 13.04 on a MSATA SSD

I am trying to install Ubuntu 13.04 on my 24Gb MSATA SSD. In my laptop, I've also got a 500Gb SATA HDD. I realize that in order for this to work I need to put my /home directory on the 500Gb HDD. ...
14
votes
6answers
33k 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 ...
13
votes
4answers
36k 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 ...
16
votes
2answers
3k 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 ...
6
votes
7answers
17k views

Removing old kernel entries in Grub [duplicate]

I regularly delete old kernels leaving only the latest two entries using Synaptic. I'm using Precise. However in my Grub "previous Linux version" menu there are quite a few entries labelled 2.6.8. I ...
13
votes
6answers
15k 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 ...
8
votes
6answers
34k views

Configure Dual Boot, Windows 7 and Ubuntu 12.04 with or without EFI

I have just installed Ubuntu 12.04 on a laptop with Windows 7 but I don't get to boot from Ubuntu. First, during the installation I made these partitions (may be too many): /dev/sda1 FAT32 SYSTEM ...
4
votes
1answer
11k views

Install Android OS along with Ubuntu and Windows

I have Dual Boot of Windows and Ubuntu 11.10, I recently learned that it is possible to install Android OS on Laptops, I also learned that in such cases Android uses its own Bootloader, Now what i ...
6
votes
0answers
1k views

Recovering Grub [duplicate]

Possible Duplicate: How can I repair grub? Are there some resources that could help me recover from Grub2 problems? I installed Ubuntu 10.10 and Windows 7 on my hard disk. I had Grub2 as ...
2
votes
2answers
7k views

Windows 8 no longer boots after Grub wiped out the Windows Bootsector

I was using Win8 and installed Ubuntu 12.10... There is an entry in GRUB for W8, but when selecting it - GRUB comes back again, so Windows never boot up. I can only launch my Ubuntu. /dev/sda1 * ...
2
votes
1answer
5k views

How can I reset my GRUB background to default?

I installed some sort of software (I think it had to do with Gnome) that changed the splash image behind the GRUB boot interface from the standard purple background to a somewhat tacky Debian splash ...
1
vote
4answers
10k views

Black screen after GRUB, can't install. UEFI

I know there are tons of threads like this and I've tried everything i can think of that has been given as an answer in those threads. The problem: I select the USB flash drive as my boot device, and ...
1
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2answers
12k views

persist commands typed to grub rescue

After deleting old linux partitions in order to free space on hard disk I got an error from grub error: no such partition and then I see a grub rescue> prompt. After googling around I found that ...
5
votes
2answers
1k views

How to secure grub recovery mode

When I boot system in to recovery mode from GRUB menu, I can get in to all powerful root without entering any password, thus insecure. How I can secure this and ensure that a password is asked every ...
4
votes
4answers
4k views

How do I restore Grub after Windows has deleted it [duplicate]

Possible Duplicate: How can I repair grub? (How to get Ubuntu back after installing Windows?) So I had a dual boot, with Windows, and Ubuntu, but I had to re-install windows for various ...
2
votes
1answer
3k views

Problems Installing Ubuntu 13.10 Alongside Windows 7 - gpart shows unallocated space

I've searched for people with similar problems but none of the fixes seem to be working for me. I have a Windows 7 (200gb + 100mb reserved partitions) and the rest (~800gb) as unallocated. This is ...