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I have windows 8 and ubuntu 12.04 LTS dual booted.. however, I have a partition with Windows 7 which does not have an entry in bootloader. How can I manually edit the GRUB so that I can get Windows 7, 8 as well as Ubuntu?

Koustuv Sinha
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    if you're able to boot into Ubuntu, open a terminal and run `sudo update-grub` and see if the Windows OS are detected.. if not try using [boot-repair](https://help.ubuntu.com/community/Boot-Repair) tools/CD.. – rusty Jan 06 '14 at 10:17
  • Try this: [http://askubuntu.com/questions/400886/how-can-i-add-a-new-operating-system-boot-entry-to-the-grub2-menu](http://askubuntu.com/questions/400886/how-can-i-add-a-new-operating-system-boot-entry-to-the-grub2-menu) – AlexL Feb 10 '17 at 12:15

1 Answers1

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You can Manually edit the Grub configuration easily by following these Steps,

However, if you have another partition in the same disk or another disk, you can try by @Reparing@ GRUB from the LTS media. Which sholud technically detect the other OS. If this doesnt help, only then head to edit the Config.

Nocturnalknight
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    please elaborate more about Repairing from LTS Media – Koustuv Sinha Jan 06 '14 at 09:56
  • When You boot in from the 12.04 LTS media, It will detect the existing OS and make this entries in GRUB automatically. I.e. Before you choose the installation mode/details etc. If you're confident of the selected OSes you can safely quit this process. Then, remove media and try again. If this doesnot help, simply "Reinstall" - with "retain Home directory". it should fix it – Nocturnalknight Jan 06 '14 at 10:11