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Purnendu Nath
Asked: 2014-11-16 21:59:19 +0800 CST

Lost access of Ubuntu partiton

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I have installed Window 7 on Ubuntu 14.04.1 pre installed Laptop. Then Windows written GRUB with it's own BOOTLOADER. Now it's only booting Windows 7. I have done these.. Booted in live mode(try mode). Then sudo mount /dev/sda2 /mnt(My Ubuntu partition),Then sudo chroot /mnt Then grub-install /dev/sda, Which was a successful grub installation, Then update-grub. Successfully detected all bootloader including Windows 7(Loader), But when I rebooted it's again going straight to Windows 7. What to do ?

grub2

2 Answers

  1. I love boot repair but ONLY as a live CD. The one and only time I ever installed it on an installation intending to fix that installation, it rendered the installation completely unbootable, so I beg you, please do not install boot repair on the drive you are trying to fix. Always run boot repair from a live booting boot repair cd or self booting usb flash drive.

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  2. Pulled from here
    2nd option : install Boot-Repair in Ubuntu

    • either from an Ubuntu live-session (boot your computer on a Ubuntu live-CD or live-USB then choose "Try Ubuntu") or from your installed Ubuntu session (if you can access it)

    • connect to the Internet

    • open a new Terminal, then type the following commands (press Enter after each line):

    For Ubuntu 12.04

    sudo add-apt-repository ppa:yannubuntu/boot-repair

    For Ubuntu 14.04 and newer

    sudo add-apt-repository ppa:kranich/cubuntu

    • then type:

      sudo apt-get update

      sudo apt-get install -y boot-repair && (boot-repair &)

    • After using the tool in an installed Ubuntu session, remove the PPA from your Software Sources.

    Using Boot-Repair

    Recommended repair launch Boot-Repair from either :

    the Dash (the Ubuntu logo at the top-left of the screen)

    or by typing 'boot-repair' in a terminal

    Then click the "Recommended repair" button. When repair is finished, note the URL (paste.ubuntu.com/XXXXX) that appeared on a paper, then reboot and check if you recovered access to your OSs.

    If the repair did not succeed, indicate the URL to people who help you by email or forum.

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