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efibootmgr

Manipulate the UEFI Boot Manager.

More information.

List the current settings / bootnums:

efibootmgr

List the filepaths:

efibootmgr -v

Add UEFI Shell v2 as a boot option:

sudo efibootmgr -c -d {/dev/sda1} -l {\EFI\tools\Shell.efi} -L "{UEFI Shell}"

Change the current boot order:

sudo efibootmgr -o {0002,0008,0001,0005}

Delete a boot option:

sudo efibootmgr -b {0008} --delete-bootnum

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