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How do I change the boot order via EFI shell version 2.70 of an Intel® Celeron® Processor N4000?

This response doesn't solve the issue: https://superuser.com/a/1596787/626570. Meaning, I can exit EFI and when I do so I am brought to the correct distro.

I am using this NUC with Ubuntu Core, for a production IoT project, therefore, Ubuntu Core needs to load at power up, not EFI.

I am unable to find an updated version of this Intel document: https://www.intel.com/content/dam/support/us/en/documents/motherboards/server/sb/efi_instructions.pdf. I am unsure if it is the latest. As when I type bcfg I get the following error:

'bcfg' is not recognized as an internal or external command, operable program, or batch file

I was able to use the document to go through the directory, find EFI, and boot Ubuntu core, but again, this device will be used in a production environment. Therefore this is not acceptable.

Lastly, I have tried pressing F2 or F6, or F10 at boot before hitting the EFI screen and that didn't work either.

I have tried Googling to find the "latest" Intel pdf with no luck.

Additional context: NUC came with Windows, and I successfully was able to replace it with the Ubuntu server. Then decided I rather use Ubuntu Core. From the Ubuntu server, I installed Ubuntu Desktop and changed the boot order to load Ubuntu Core (ubuntu-core-22-amd64.img.xz) from USB.

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  • ubuntu.com/core/docs/install-nuc
    – ChanganAuto
    Commented May 5, 2023 at 14:18
  • @ChanganAuto that does not address the question.
    – runningraptor
    Commented May 7, 2023 at 16:06
  • I can suggest an edit but will you accept it?
    – ChanganAuto
    Commented May 9, 2023 at 1:06
  • BTW, I've already corrected your answer. I hope is to your liking and if so please accept the edit.
    – ChanganAuto
    Commented May 9, 2023 at 1:18

2 Answers 2

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Note that 2.70 is probably the version of the main UEFI specification implemented by the firmware, not the version of the shell. As far as I know, there is no version 2.70 of the UEFI shell in existence yet... the latest release would be UEFI Shell v2.2, release 22H2.

You already found your answer, but let me suggest some alternatives:

  • If you need specifically to edit the boot settings within the UEFI shell (e.g. if you want to use a .nsh script to automate something at the firmware level), you could supply an updated version of shell.efi to the ESP and run that. The updated shell.efi would then allow you to use the bcfg command. Unfortunately the TianoCore project seems to release source code versions only, but https://github.com/pbatard/UEFI-Shell provides the shells as pre-built .EFI files (go to Releases, then extract the \efi\boot\bootx64.efi from the newest available ISO image: that's your updated shell).

  • If you can boot the system to Linux even once in UEFI mode, there should be an efibootmgr command you can use to manipulate firmware-level boot settings. If you have a stripped-down installation for IoT, you might have to add the efibootmgr package first.

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  • Thank you this is helpful and bookmarked it.
    – runningraptor
    Commented May 10, 2023 at 10:59
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Rather than change the boot order from the UEFI shell. Pressing ESC at boot opened the firmware (UEFI) settings where I changed the boot order.

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