Debian is not boot after installation on TrueNAS Virtual Machine.

After installing Debian on a TrueNAS 12.0 Virtual Machine, I had seen Sheel, instead grub screen.

The solution to this issue:

1. Exit from shell with the command: “exit”.
2. Select “Boot Maintenance Manager”.
3. Select “Boot From File”.
4. Select “{VOLUME}/EFI/debian/grubx64.efi”.
5. After these actions grub loader will show on the screen.

To prevent this situation in the future:

1. Create directory: “mkdir /boot/efi/EFI/BOOT”.
2. Copy and rename file: “cp /boot/efi/EFI/debian/grubx64.efi /boot/efi/EFI/BOOT/bootx64.efi”.
3. Reboot virtual machine.