How to install grub after installing Windows 10

First live boot to your Linux Mint system, using external Live CD/USB Drive, then follow these commands to re-install GRUB on MBR.

  1. mount your Linux installed partition to some mount point. here XY is the number of your Linux distro partition.sudo mount <root-partition[e.g. /dev/sdaXY]> <mount-point[e.g. /mnt/]>
  2. Now bind some essential live root partition directories to mounted root partition at /mnt.sudo mount --bind /dev /mnt/dev && sudo mount --bind /dev/pts /mnt/dev/pts && sudo mount --bind /proc /mnt/proc && sudo mount --bind /sys /mnt/sys
  3. Now, change the root to newly mounted partition directory.sudo chroot <mount-point[e.g. /mnt/]>
  4. Now, install the GRUB using grub-install command at your HDD MBR.grub-install /dev/sda
  5. Finally update the grub entries to show newly detected partition operating systems.update-grub
  6. And at last unmount all the binded partition directories, and then reboot.sudo reboot

That’s it, hope this will help!!

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