Efibootmgr

calendar Dec 11, 2023 · 1 min read · Linux  ·
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Utility to edit UEFI boot entries

List entries

1efibootmgr -v

Create entry

 1# Not Verified
 2# efibootmgr -c  -d /dev/sda -p 1 -L LinuxMint -l /EFI/ubuntu/grubx64.efi
 3
 4
 5# Verified
 6# Recommended
 7sudo efibootmgr --create --disk=/dev/sda --part=4 --label="fedora_ssd" --loader='\EFI\fedora\shimx64.efi'
 8#
 9# This also works
10sudo efibootmgr --create --disk=/dev/sda --part=4 --label="fedora_ssd2" --loader='EFI\fedora\shimx64.efi'
11#

Windows

1sudo efibootmgr --create --disk=/dev/nvme0n1 --part=1 --label="windows_test" --loader='\EFI\Microsoft\Boot\bootmgfw.efi'

for windows path can also be \EFI\Boot\BootX64.efi

Both seem to work fine 'part' should specify the partition number of the EFI parition (FAT32) vfat filesystem

Delete entry

1sudo efibootmgr -B -b boot_number_to_be_deleted

or

1sudo efibootmgr --delete-bootnum --bootnum 0

when passing the boot entry number we are not requested to include the padding 0s. If the bootnum is 000A just write A

Boot from a specific entry

First run (maybe as root)

1efibootmgr -v

Set the entry for one time boot

1sudo efibootmgr -n XXXX

or

1sudo efibootmgr --bootnext XXXX

Reboot

1sudo reboot

Reference