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How do you modify, e.g., the loader or label attributes of a UEFI boot entry from linux?

The man page suggests that the following should work (assuming I want to change bootnum entry 0008):

$ sudo efibootmgr -b 0008 -L "wanted-label"
$ sudo efibootmgr -b 0008 -l '\EFI\ubuntu\whatever.efi'

However, the output of sudo efibootmgr -v before and after the above commands produce identical output. I have tried it on Ubuntu 18.04 and 20.04 systems with the same result.

Is it possible to change the above mentioned attributes of a UEFI boot entry from linux? If so, how?

Background: My original problem is that I have a Windows 10/Ubuntu 20.04 dual-boot system and wish to modify the boot loader string of the Windows Boot Manager UEFI entry to keep Ubuntu as my default boot system. The answer to this question explains how to to the modification from Windows. I would like to do it from linux.

Niclas Börlin
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  • You can change order with efibootmgr and -o See: http://askubuntu.com/questions/486752/dual-boot-win-8-ubuntu-loads-only-win/486789#486789 and man efibootmgr or create new entries and delete old or duplicate entries. More examples: https://askubuntu.com/questions/486752/dual-boot-win-8-ubuntu-loads-only-win & https://www.linuxbabe.com/command-line/how-to-use-linux-efibootmgr-examples – oldfred Mar 09 '21 at 13:56
  • I think you have to delete and recreate the entry. See: https://askubuntu.com/questions/1125920/how-can-i-change-the-names-of-items-in-the-efi-uefi-boot-menu – Andrew Lowther Mar 10 '21 at 00:31

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