Sunday, July 25, 2021

Remove boot option in bios boot menu UEFI

user@PC:~$ sudo fdisk -l

[sudo] password for user: 

Disk /dev/nvme0n1: 238,49 GiB, 256060514304 bytes, 500118192 sectors

Disk model: TS256GMTE110S                           

Units: sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disklabel type: gpt

Disk identifier: 6A76AEF7-D60C-4CA8-A4F2-9053CCDB5F29


Device             Start       End   Sectors   Size Type

/dev/nvme0n1p1      2048   1023999   1021952   499M Windows recovery environment

/dev/nvme0n1p2   1024000   1228799    204800   100M EFI System

/dev/nvme0n1p3   1228800   1261567     32768    16M Microsoft reserved

/dev/nvme0n1p4   1261568 421232563 419970996 200,3G Microsoft basic data

/dev/nvme0n1p5 421232640 422209535    976896   477M Linux filesystem

/dev/nvme0n1p6 422209536 485373951  63164416  30,1G Linux filesystem

/dev/nvme0n1p7 485373952 500117503  14743552     7G Linux swap

https://wiki.archlinux.org/title/EFI_system_partition

https://www.howtogeek.com/414634/how-to-mount-and-unmount-storage-devices-from-the-linux-terminal/

user@PC:/$ sudo mkdir /mnt/efipart

user@PC:/$ sudo mount /dev/nvme0n1p2 /mnt/efipart

user@PC:/$ ls /mnt/efipart

user@PC:/$ sudo ls /mnt/efipart

EFI

user@PC:/$ sudo ls /mnt/efipart/EFI

Boot  mageia  Microsoft  ubuntu

user@PC:/$ sudo rm -R /mnt/efipart/EFI/mageia

user@PC:/$ sudo ls /mnt/efipart/EFI

Boot  Microsoft  ubuntu

user@PC:/$ sudo umount /dev/nvme0n1p2 /mnt/efipart

umount: /mnt/efipart: not mounted.

user@PC:/$ sudo rmdir /mnt/efipart

IT DID NOT WORKED OUT. STILL MAGEIA IN BIOS BOOT OPTIONS.


Should work with efibootmgr

sudo apt install efibootmgr

efibootmgr -v

sudo efibootmgr -b <bootnum> -B

-b option specify the boot number. -B option delete that boot number.

https://www.linuxbabe.com/command-line/how-to-use-linux-efibootmgr-examples


BUT

SOLVED IN WINDOWS 10:

Run cmd as Administrator

C:\Windows\system32>bcdedit /enum firmware


Firmware Boot Manager

---------------------

identifier              {fwbootmgr}

displayorder            {dedfa429-a2c2-11eb-bfa1-806e6f6e6963}

                        {bootmgr}

                        {b3bb7720-ecdd-11eb-bfc7-806e6f6e6963}

timeout                 1


Windows Boot Manager

--------------------

identifier              {bootmgr}

device                  partition=\Device\HarddiskVolume2

path                    \EFI\MICROSOFT\BOOT\BOOTMGFW.EFI

description             Windows Boot Manager

locale                  en-US

inherit                 {globalsettings}

default                 {current}

resumeobject            {3c259424-a104-11eb-a9ac-c268960a444b}

displayorder            {current}

toolsdisplayorder       {memdiag}

timeout                 30


Firmware Application (101fffff)

-------------------------------

identifier              {b3bb7720-ecdd-11eb-bfc7-806e6f6e6963}

device                  partition=\Device\HarddiskVolume2

path                    \EFI\MAGEIA\GRUBX64.EFI

description             mageia


Firmware Application (101fffff)

-------------------------------

identifier              {dedfa429-a2c2-11eb-bfa1-806e6f6e6963}

device                  partition=\Device\HarddiskVolume2

path                    \EFI\UBUNTU\SHIMX64.EFI

description             ubuntu


C:\Windows\system32>bcdedit /delete {b3bb7720-ecdd-11eb-bfc7-806e6f6e6963}

The operation completed successfully.

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