Wednesday, July 25, 2018

grub2 - Ubuntu 14.04 dual boot with windows 10



This question got a downvote, and I have no idea why. If you have a good enough reason to do so, please share.




OK, I know that this question has been asked a lot before, but I could not find any questions that exactly relate to my case. I just got a new PC with Windows 10 on an SSD. With my previous PC I had two hard drives, one with Ubuntu, one with Windows 7. I dual booted flawlessly with that setup. Now, I have moved these two HDD's to the new PC, but I would like to know how I can use my HDD with the existing Ubuntu on it to dual boot with the new Windows 10.



In summary:



My new PC has Windows 10 installed.



I moved my HDD containing an existing Ubuntu installation to the new PC.



I would like to set this up such that I can dual boot with windows 10 and ubuntu. Note, both operating systems are already installed on different HDD's, but the ubuntu installation was installed alongside Windows 7 originally (see extra info below). I just need to make them dual boot together. I can already boot into Ubuntu through my BIOS settings (by making the HDD containing Ubuntu the primary HDD), but I would not like to do that every time.




Extra info:



When I boot from the HDD containing Ubuntu, the grub menu comes on, with Windows 7 still as an option, but I cannot boot into Windows 7 though.



Thank you



Eventually you need to make an entry for Win10 in grub if the reconfiguration did not add one. Further, you might want to check if the BIOS (EFI or legacy) has a specific boot-order that queries your Linux HDD first. This shows Grub first and lets you decide which system you want to boot.


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