I dual booted Kali with Ubuntu 16.04, unfortunately it ended up deleting the partition.
I installed Kali on, meanwhile, I think the grub loader was installed on Kali. I am unable to use my system at all.
I tried boot-repair, the recommended function, it did not repair the grub.

Boot Info Summary: http://paste.ubuntu.com/p/9mz26p4Mhp/


I had a similar problem (no boot, no grub) that I fixed by:

Read man grub-install

  1. Boot from a Live USB key.
  2. Open a terminal window Ctrl-Alt-T
  3. Do sudo grub-install /dev/sda
  4. Note: I also did sudo grub-install /dev/sda1, but I don't think it helped my problem.
  • i have done this before,its still not working.Thanks though – Mightyzeus May 17 at 9:56

I have repaired the grub after long hours of hunting. These are the steps I took

  1. boot ubuntu from a live USB
  2. Open terminal and run sudo su
  3. dd if=/dev/zero of=/cowfile bs=1024 count=1024
  4. mkfs.fat /cowfile
  5. mv /cowfile /cow
    This creates a 1MB file with a FAT filesystem in it, and moves it to /cow, which is the “fake” path that grub-mkconfig can’t find. With it in place, /cow looks like an empty FAT partition to grub-mkconfig, and will be quietly ignored.

  6. sudo mount /dev/sdaX /mnt

  7. grub-install --root-directory=/mnt /dev/sda

    Finally update grub boot loader and done!

  8. sudo update-grub

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