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I have Ubuntu 16.04 running on below disk and I want to install Windows 10 alongside it

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My understanding is that the overall process should be:

  1. Resize my disk to make space for Windows 10
  2. Install windows 10
  3. Install grub again so I can dual-boot Ubuntu/Windows

Regarding step 1, Gparted won't let me resize ext4 because of the swap that's after, so I should do:

  • Turn off swap
  • Remove swap partition from /etc/fstab
  • Resize ext4 down to create free space for Windows 10 + new swap
  • Recreate swap from some of the free space
  • Leave some of the free space for Windows 10
  • Resume with steps 2 and 3 listed above

Is there anything I'm missing/wrong about before I get started with this process?

Max
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  • You should resize the drive from booting to a LiveCD/DVD/USB so that you can make sure that no partitions are mounted. The key next to the partition name means that it is mounted and locked so that you can't make any changes. Then you should be able to shrink that partition and move the swap partition next to it after you shrink it. – Terrance Sep 10 '18 at 17:21
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    Possible duplicate of How to resize partitions? – karel Sep 10 '18 at 17:22
  • @Terrance: thanks. so no need to turnoff/remove/recreate the swap? I just boot into live CD/USD, resize ext4 and move swap next to it? – Max Sep 10 '18 at 17:55
  • Should be OK to do that. As it stands the swap and the root / have UUIDs on them and as long as the UUIDs don't change, there shouldn't be any reason to modify the boot other than after the Windows install that should change the bootloader which you have planned to reinstall GRUB after. – Terrance Sep 10 '18 at 17:57

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