enter image description hereI have 2 Operating systems, Windows 10 and Ubuntu. Both installed on different drives. I wish to completely remove Windows 10 and the space occupied by Windows 10 to be added to Ubuntu. How do I do that? (I don't know if this is important or not, my laptop supports UEFI boot)

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    Boot your Ubuntu partition and open Gparted, edit your question with a screenshot of how your partitions look. – M. Becerra Dec 15 '16 at 12:22
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    you can format the windows partition. You have to watch out though that your bootloader is not on that partition. And you should update it afterwards. – Fl.pf. Dec 15 '16 at 13:11
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    Also note that there is inherent danger in resizing and reformatting partitions, so please keep backups. – negusp Dec 15 '16 at 13:44
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    See How to Resize Partitions and How do I add this extra partition to my installed Ubuntu system. Each approach (resizing partitions or re-purposing the existing Windows partitions) has merit. – Rod Smith Dec 15 '16 at 15:03
  • I only see one drive in your gparted screen shot (that's normal). I would prefer if you could edit and include the output of sudo parted -l since you mention 2 drives I think it's best we see both before jumping to a conclusion. – Elder Geek Dec 15 '16 at 18:05

The Ubuntu installer easily lets you erase Windows and replace it with Ubuntu.

Here is what you have to do :

  1. Backup your data ! All of your data will be wiped with your Windows installation so do not miss this step.

  2. Create a bootable USB Ubuntu installation.

  3. Boot the Ubuntu installation USB drive and choose erase everything and install Ubuntu.

  4. Follow the installation process ... and at the step Installation Type select Replace Windows 10 with Ubuntu.

enter image description here

  • Does this work even if ubuntu is already installed? – alonso s Feb 21 '18 at 21:53
  • No, this is for if only Windows is installed. – Chai T. Rex May 21 '18 at 22:44

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