Ubuntu – Triple Boot Ubuntu, Kali Linux & Windows 10 Grub issue

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I used to run dual booting Ubuntu with Windows 10 with no conflicts at all for over a year now. The Grub Boot-loader was Ubuntu's.

I decided to install Kali Linux to fulfill triple booting for educational purposes. The issue is the default Grub loader now is Kali's and it's only showing Ubuntu & Kali Linux.

After trying Gparted and disk listing I realized that windows 10 is still there safely.

I remember choosing to install Kali Linux's grub boot-loader at the installation which said that it detected Ubuntu & Windows 7. Then it over-wrote Ubuntu's grub and windows isn't accessible anymore.

I am new to Kali but I know one thing. I would probably get windows 10 Back if I can install Ubuntu's boot-loader back as the default grub. Any idea how to perform this? Or what would the best solution be with regard to this case?

I also had UEFI as the default boot method from the BIOS but switching it with Legacy back and forth makes no difference.

Best Answer

I would recommend you to run a live cd of Ubuntu and install boot-repair. Open the terminal and copy and paste the following command:

sudo add-apt-repository -y ppa:yannubuntu/boot-repair && sudo apt-get update

After successfully adding and updating the repository type the following command:

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

There you can solve your issues related to boot.

Or try it with Super GRUB 2 disk.

You can download it from here.

Then install it in a usb using Unetbootin Now you could restart your system and make sure it is set in the boot option menu.

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