Saturday, July 2, 2011

Reinstall grub2 after installing windows 7 (XP/Vista)


You may need to reinstall grub when windows is installed after ubuntu (or if you reinstalled windows in dual boot (Windows and ubuntu) system). I used following steps for reinstalling grub in order to login to my Ubuntu 10.04 after reinstalling Windows 7 on my machine.

1. boot the ubuntu LiveCD

2. Open a terminal and type
sudo fdisk -l


This list the partition tables, and in my case root (/) partition is on /dev/sda9.

3. Mount that partition using following command.

sudo mount /dev/sda9 /mnt

4. Run the grub-install command as below. This will reinstall the grub 2
sudo grub-install --root-directory=/mnt /dev/sda
Here "sda" is the hard disk on which your Linux distribution is installed!

5. Reboot

6. Finally Refresh the grub 2 menu using following command

sudo update-grub

Now everything should be fine :)



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17 comments:

  1. MaTachiJanuary 8, 2012 at 5:53 AM

    Thanks, worked great! :)

    ReplyDelete
  2. pavol slovakiaJanuary 10, 2012 at 11:22 AM

    Thanks , super

    ReplyDelete
  3. AnonymousMarch 4, 2012 at 3:27 AM

    THIS IS THE Clearest post for reinstalling grub2 on 10.04. Ive done this process like three times and its always a hassle finding instructions for 10.04...emailing myself this link now....thanks:-)

    ReplyDelete
  4. Kasun Weranga GunathilakeMarch 4, 2012 at 6:57 AM

    Thanks all for commenting, it is a pleasure to see everybody's doing it successfully by following the post.

    ReplyDelete
  5. olinewsMarch 5, 2012 at 11:57 PM

    Worked like a charm for me too on xubuntu 11.10-amd64 + Win7-x64. Thanks alot for sharing this.

    ReplyDelete
  6. AnonymousMarch 18, 2012 at 7:52 AM

    Thanks very much, I spend 3 hours without your help, but by your help, it was only 5 minute.. very great..

    ReplyDelete
  7. AnonymousApril 24, 2012 at 10:13 AM

    Thank you! This was perfect

    ReplyDelete
  8. ShivkuMay 6, 2012 at 11:47 AM

    Worked very good, now got back my BackTrack 5 and Win7 64bit OS running too :)

    ReplyDelete
  9. ge0rge04June 21, 2012 at 7:41 AM

    Tnx !

    ReplyDelete
  10. LuDiJuly 16, 2012 at 4:35 PM

    Much Appreciated!

    ReplyDelete
  11. AnonymousJuly 18, 2012 at 3:00 AM

    Just wanted to say: Thank you very much :) works like a charm

    ReplyDelete
  12. AnonymousJuly 23, 2012 at 9:36 AM

    Worked perfectly for my lady's laptop after she wanted Windows 7 installed next to an existing Xubuntu installation. Interestingly, both the official Ubuntu-provided solutions, Boot-Repair and a terminal walk through, did not work at all. Perhaps consider sending this upstream so it makes it into the Ubuntu documentation?

    Thanks again! Made me look like a genius. :)

    ReplyDelete
  13. Roshnal LihinikaduJuly 27, 2012 at 9:01 AM

    Thanks a lot bro! I had installed Windows 8 after Ubuntu 12.04 and this got me back my grub easily.. Thanks again!

    ReplyDelete
  14. ismailJuly 30, 2012 at 2:49 PM

    thank you very much man... you saved my day.. :)

    ReplyDelete
  15. Anand RoshanJuly 3, 2013 at 6:06 AM

    Hi thanks nice tutorial . very useful. Thank you very much

    ReplyDelete
  16. AnonymousAugust 13, 2013 at 4:47 AM

    thank you. Your tutorial is simple, correct and very useful , Cheer:)

    ReplyDelete
  17. windows 8 free download trial verision official demoNovember 19, 2013 at 9:00 AM

    Ive done this process like three times and its always a hassle finding instructions for 10.04...emailing myself this link now....thanks:-)

    ReplyDelete