Ubuntu :: Repair GRUB 2 Using Live CD?
Sep 24, 2010
I have been trying to repair the GRUB 2 Bootloader by using the LIVE Ubuntu Ultimate 2.7 DVD.
Basically I've been unable to boot Linux Ubuntu Ultimate 2.7 ( due to a multi boot set up) & read that it is possible to repair the boot loader by re installing it from the live dvd.
I've already tried to load up the DVD & run the Terminal program - on the command line I type '# grub-restore' & the reply is GRUB not loaded??
I've tried other command lines that are on various other posts but non of them work.
Or are there certain Linux operating system discs that have the function to repair the boot loader from the live dvd.
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Jun 18, 2010
The boot sector somehow got messed up on a friends computer while updating. I used to know how to do it with the old version, but now that they've updated it and changed everything , how do you repair the boot sector from a live-CD with Grub 2?
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Jun 11, 2010
I have installed fedora 13 x64 using a live cd on my computer But i need to reinstall win7. after installing win 7 grub had been damaged. How can i repair Fedora using Live cd?
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Nov 24, 2010
I created a new partition in Windows Vista which, after rebooting, screwed up Grub. I believe that I need to reinstall Grub and everything should be fine, and I remember reading the command to do this on this forum, but I can't find it. When I boot, I now get a black screen with white letters instead of the Grub boot menu. It says something about "Minimal Grub" at the top and gives me a prompt that looks like this.
grub>
I can boot the live CD and I have internet access with it, but I can not remember the terminal command to repair Grub. Can someone tell me this command?
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Jan 17, 2009
I am trying to install my laptop in a triple-boot configuration with Fedora 10, Windows XP and Windows 7 beta. I did already installed them in that order. This is how it is layed out on the harddisk:
Now i want to use grub to present a menu at boot so i can select an OS. Because I installed XP last it boots straight into XP. I've understood i should be able to do the following:
All goes well until the last step (grub-install). It gives an error stating that /dev/sda doesn't exist, which is correct; It doesn't. I do have the "device" listed outside of the chrooted environment.
My question is: How do I get /dev/sda available in my chrooted environment?
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Jan 3, 2011
Can I repair Fedora 14 from the live installation Disk?
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Oct 28, 2010
I get this message when I boot
init: udevtrigger main process (440) terminated with status 1
init: udevtrigger post-stop process (449) terminated with status 1
init: udevtrigger main process (447) killed by TERM signal
I'm now on the live cd, is there anyway to either fix that, or just repair the system? I tried booting in safe mode too, none of those started up either.
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Jun 23, 2010
I want to use the live cd (Linux mint 9) to do a repair install on my system, but when I start, it says that it has detected another instance of linux and this must be removed before I can continue. I don't want to do this as I have a lot of data on this system and I don't want to lose it. The error occurred when I did a dist-upgrade and installed new kernels. Before I installed the kernels, a message came up saying the following packages are already installed but are no longer required. Use apt-get autoremove to remove them. I did this and now when I boot, I get as far as the five changing dots on the screen and it just stays there. I went into command line and ran apt-get mint-meta-main mint-meta-gnome, and at the end it came up with problem with /etc/utilities/desktop.
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Jul 8, 2010
I had an dualboot problem, after updating ubuntu to 10.04 my windows vista option in the grub of ubuntu was gone.Now I have installed windows 7.And the grub does not appear again, there is no grub at all.Now sombody told me I could fix or repair the boot record in windows 7.Does somone know how I can repair the grub in which I can choose between windows 7 and Ubuntu?
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Mar 11, 2010
i have installed first xp after that liux . but now i want to format xp. but xp is not formatting
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Oct 10, 2010
i have using ubuntu for 3 days with no problem i have 3 operating system vista,7,ubuntu vista and ubuntu on c: drive today i want to use vista for something and when i open it on ubuntu boot menu my laptops recovery try to recover and just give an eror like:EROR with 200 punto when i restart computer i just saw eror: no such partition Grub rescue> command screen i have no recovery dvd and ubuntu cd now i left them to my friend so can i repiar it just with commands if ubuntu is demaged because of recovery screen on D: partition i have win7
i just start using ubuntu i dont know any thing about it
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Mar 2, 2011
I have installed windows 7 back to its former state in after foolishly messing around with some installation options in an Ubuntu install (this caused windows to disappear, and me to repair it). In *repairing* windows, I overwrote my grub file and the boot options for Ubuntu, so that it looks something like this:
Disk 1: Primary Partition - Windows 7
Disk 1: Secondary Partition - Windows 7
Disk 1: Secondary Partition - Free Space ( this is where I have Ubuntu installed)
How can I repair my grub file so that I can boot into my Ubuntu installation?
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Jan 22, 2011
I'm going to be installing Windoze (because 3D graphics are still not there in Linux), but that will of course override the MBR. So how do I rewrite it? I just tried starting from the Fedora 11 DVD until it got into the 1st graphical screen, and then I tried to mount *any* of my Fedora partitions - I think it's made 5 of them (God knows why!!), but anyway,none of them would mount except /boot - kept saying "wrong fs type or superblock" etc. My plan was of course, to chroot my current Fedora partition, and then run grub-install, but of course I can't if the partition itself doesn't mount.
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Jul 20, 2011
I have forget the root password of Red Hat Enterprise Linux 5. Please tell me how to recover it from the other linux account of the same version. I also want to know that after setting the new password did I have to repair the grub or grub will be as usual.
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Oct 28, 2009
The new GRUB2 was supposed to configure itself from the old grub, but got the kernel image partition wrong.I have booted from Knoppix live cd, but need to write to system files. I have searched, and found several suggestions that apparently work on Win machines, but RO permission for root on Linux is a harder nut to crack.
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Oct 2, 2010
I need to create a bootable usb drive so I can repair or reinstall the grub loader.
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Jun 18, 2011
I've done a search thru the forums on a recent headache but couldn't find anything. now we all know that windows installations knackers the grub boot-up, and it becomes modus-operandi to repair the boot loader, with a live distro. however, in my current dual boot system (vista.sp2/fedora12), i've done a clean install of windows7 over the current windows ntfs partition. as standard, the boot menu would vanish. but when i put in the live-linux cd, gparted now shows the fedora partition (sda6) as LVM2. i'm somewhat of a neophyte with linux, but fedora12, suse11.2 and ubuntu don't seem to yet support this file system.
since i don't have critical data on the fedora partition yet, i usually wouldn't mind reformating this part', but the wireless chipset on my laptop cost a fortune on cups of coffee and beer to install, and in addition i used the fedora12 FEL spin and want to keep the installation intact. is there anyway to make the LVM2 indentifier back to ext3 or 4 and repair grub form there (without loosing the current partition kernal etc.)?
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Nov 10, 2010
i know i asked earlier but i got my usb to be mounted on a different fedora distro. how do i now find my documents or repair it? also how do i add in a repair line if possible?
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Jan 5, 2011
I use Fedora 14 and have problems with graphic mode. What commands i should use in "grub>" to get single mode to repair my installation. This appears after try to change installt packages.
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Oct 23, 2009
I have XP, Win7 Pro and F 11 installed. Before I installed F 11, Win 7 boot mgr was working fine. I then installed F 11 and I went to System/Admin/bootloader to edit it and it wouldn't bring up the boot loader. In the attachment was the error msg. Now my only option when I boot up is F 11.
I do not have access to the Win 7 DVD only the F 11 install disk since I am on a fishing trip and need to use Win 7. How can I repair to the grub boot loader to boot into Win 7?
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Jan 14, 2010
I had windows XP on my c:drive. installed ubuntu 9.10 on a 27 gig unallocated space. ubuntu ran fine. Then i boot to win xp and used a partitioning software to take back some other unallocated space. after it rebooted to complete the partitioning processes grub wouldn't load. So i need to re install grub from this ubuntu 9.10 live cd.i tired the following
grub(didnt work the first time said i needed to install grub so did : root@ubuntu:~# sudo apt-get install grub )after grub was installedgrub> find /boot/grub/stage1 Error 15: File not foundthe previous linux partition I can see in the Computer with the boot directory and is called 1000gb hard disk: 27 GB filesystem see screenshot.
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Mar 1, 2010
So here is my problem:
I'm trying to restore the grub using a ubuntu 9.10 live cd. I have two partitions in my computer, and i used the partition that contained Vista to install windows 7. Now, i'm trying to restore the grub so that i can also boot ubuntu.
When i do "sudo fdisk -l", the output is:
Disk /dev/sda: 120.0 GB, 120034123776 bytes
138 heads, 12 sectors/track, 141571 cylinders
Units = cylinders of 1656 * 512 = 847872 bytes
Disk identifier: 0x0fb3cfe1
[Code]....
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May 24, 2011
here it is: I tried installing grub from the Live CD to one of my hard disks (/dev/sdc) on a PCI to ATA adapter. I wanted to be able to choose which OS to boot from when the ATA adapter booted from the hard disk with GRUB on it, but all I get is a GRUB prompt. How do I make a normal GRUB menu on that hard disk with all my OS'es on the menu?
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Mar 16, 2010
I decided that I wanted to take Arch for a spin for the next week or so (I've had Ubuntu installed for a while) and so I thought the logical thing to do was to erase my partitions and start over with a new live cd...
Well.. that didn't work. I tried to do it from Disk Utility in OS X which succeeded in deleting most everything... EXCEPT grub is still in the mbr (or whatever it runs from through rEFIt). But all I see when I start up in the non-OS X partition is:
Code:
GRUB
At any rate, no Live CDs work, I can't delete the partitions from OS X (including after booting up from the OS X Install disk).
If I hit F1 I can get the "grub>" prompt. But I can't figure out how to launch a live cd. To my knowlege, there's not a "bios" for rEFIt where I can force it to boot from CD, is there?
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Apr 30, 2010
After upgrading from 9.10 to 10.4 computer stop working. Booting stops on grub with a massage:
Code:
Grub loading.
Error: the symbol 'grub_puts_' not found
grub rescure>
I try to restore grub but after command:
Code:
insmod /boot/grub/linux.mod
I get error:
Code:
Error: the symbol 'grub_puts_' not found
Is any way to restore grub without Live CD ?
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May 3, 2010
I installed 10.04 by desktop image, and it did not let me install grub where I wanted. That is why I did not install grub at all. I got in console by ctrl-alt-F1 after installation is complete. How do you install grub from there?
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Jun 17, 2010
I recently installed Win7 on my machine and of course, that removed Grub and didn't install the boot manager. I tried to download EasyBCD but it doesn't allow me to select the appropriate partition for Linux so I can't boot into Linux. Is there a way to install Grub from the live CD Without having to completely reinstall Ubuntu??
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Dec 3, 2010
I had installed 10.10 on another partition, and then I wiped it, so I need to reinstall grub on my 9.10 partition. I have tried a few methods, including one that had worked for me in the past.But every time I boot my computer, it just says "GRUB loading.", and hangs. How should I fix this?
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Dec 4, 2010
In drs305's standout article HOWTO: Purge and Reinstall Grub 2 from the Live CD, in the section where it says:
Quote: From the Live CD:
* If the Ubuntu OS cannot be accessed through the normal boot process (see above), boot a compatible installation CD/Live CD. The Grub 2 files are by default installed in the partition's /boot/grub folder and will be placed in this folder if the commands are run as instructed. (emphasis mine)
I'm not certain what precisely means "compatible" here? Is it using the same desktop (K/X)Ubuntu what is installed on the hard drive? Or the same release number (such as, in my case 9.10) or both or just ---well, you get the idea I'm sure.
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Dec 11, 2010
I have Ubuntu 10.04 with file system EXT4 and dual booting with Vista The problem is I am about to reinstall Vista which will overwrite Grub 2 I know how to restore Grub2 with the Live CD I currently I only have a Live CD of Ubuntu 8.04 which doesnt support EXT4 neither Grub2 I am on a very limited INTERNET so I cant download the Live CD. A solution would be the minimal cd image but the download stall at 96%
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