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Thread: I need to reinstall Grub 2, but how?

  1. #1
    Join Date
    Dec 2009
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    17
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Question I need to reinstall Grub 2, but how?

    Today I reinstalled my Windows partition of my PC. If you need to know, my config is like this
    -Windows (formally XP MCE, now Vista Ultimate) on Partition 1
    -Windows Recovery on Partition 2
    Logical Partition
    -Ubuntu 10.04 Lucid on Partition 3
    -Ubuntu Swap

    I have to reinstall GRUB because Windows wrote over the MBR.

    I have a 10.04 install disc, but I do not know how to reinstall Grub2

    how do I reinstall Grub2?

  2. #2
    Join Date
    Jan 2007
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    Hidden!
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    Ubuntu Development Release

    Re: I need to reinstall Grub 2, but how?

    This post should help you restore your Grub installation:
    How to restore the Ubuntu/XP/Vista/7 bootloader (Updated for Ubuntu 9.10)

    Should work for Lucid as well for those reading this with a 10.04 install.
    Last edited by drs305; May 17th, 2010 at 02:26 AM.
    GRUB2

    Retired.

  3. #3
    Join Date
    Dec 2009
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    17
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Question Re: I need to reinstall Grub 2, but how?

    Where exactly does it say anything about GRUB2 in there

  4. #4
    Join Date
    Jan 2007
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    Hidden!
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    Ubuntu Development Release

    Re: I need to reinstall Grub 2, but how?

    D'oh, sorry. Right title but apparently the answer to another post was still in memory. I've corrected the original.
    GRUB2

    Retired.

  5. #5
    Join Date
    Jul 2011
    Location
    India
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    43

    Re: I need to reinstall Grub 2, but how?

    This is quite long but worked for me

    1. Boot to the LiveCD Desktop (Ubuntu 9.10 or later).
    2. Open a terminal - Applications, Accessories, Terminal.
    3. Determine your normal system partition - (the switch is a lowercase "L")

    sudo fdisk -l
    * If you aren't sure, run

    df -Th. Look for the correct disk size and ext3 or ext4 format.
    4. Mount your normal system partition:
    * Substitute the correct partition: sda1, sdb5, etc.

    sudo mount /dev/sdXX /mnt # Example: sudo mount /dev/sda1 /mnt
    5. Only if you have a separate boot partition:
    * sdYY is the /boot partition designation (for example sdb3)
    *sudo mount /dev/sdYY /mnt/boot
    6. Mount the critical virtual filesystems:

    sudo mount --bind /dev /mnt/dev
    sudo mount --bind /proc /mnt/proc
    sudo mount --bind /sys /mnt/sys
    7. To ensure that only the grub utilities from the LiveCD get executed, mount /usr

    sudo mount --bind /usr/ /mnt/usr
    8. Chroot into your normal system device:

    sudo chroot /mnt
    9. If there is no /boot/grub/grub.cfg or it's not correct, create one using

    update-grub
    10. Reinstall GRUB 2:
    *Substitute the correct device - sda, sdb, etc. Do not specify a partition number.

    grub-install /dev/sdX
    11.Verify the install (use the correct device, for example sda. Do not specify a partition): sudo grub-install --recheck /dev/sdX

  6. #6
    Join Date
    Jun 2008
    Location
    Up state NY Southern Tier
    Beans
    190
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: I need to reinstall Grub 2, but how?

    Deleted post. Started new thread


    Shobuz99
    Last edited by Shobuz99; January 24th, 2013 at 03:51 PM. Reason: started new thread

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