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what is the proper way to recover grub in an EFI environment ?

Dear all,

I am on a system which used to dual-boot between Debian GNU/Linux and
MS-Windows.  I have shared couple of screenshots to show the structure
of how Debian/GNU linux looks within MS-Windows. For some reason, I'm
unable to get grub screen and only get the MS-Windows bootloader.

The install I had done was in legacy mode when I had Debian installed
and subsequently had changed the boot mode from legacy to EFI (on
suggestion from a debian DD and it worked for quite sometime.) Now
though the situation is such, I am unable to boot into Debian using
MS-bootloader. Now while there are a few methods [1, 2, 3] by which I
could arguably get into Linux, I am looking to see what would be the
recommended way. A search on the Debian wiki didn't give any help
except [4] and I'm not sure that would be a good way.

FWIW, I did look into /boot via DiskInternals Linux reader and found
that /boot/efi/ is empty while /boot/grub/x86_64-efi/grub.efi is

1. https://www.supergrubdisk.org/super-grub2-disk/
2. https://itsfoss.com/no-grub-windows-linux/
3. https://wiki.debian.org/GrubEFIReinstall
4. https://wiki.debian.org/BootLoader

Would somebody tell/share what would be the recommended method in the
above scenario of all the tools.

          Shirish Agarwal  शिरीष अग्रवाल
  My quotes in this email licensed under CC 3.0

E493 D466 6D67 59F5 1FD0 930F 870E 9A5B 5869 609C

Attachment: partition-manager-windows-10.png
Description: PNG image

Attachment: disk-internals-debian-linux.png
Description: PNG image

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