Description
EFISTUB boot entries can be created and maintained with an ncurses-backed shell script around efibootmgr. update-efi-entry is for advanced users booting Linux kernels directly from UEFI firmware.
Back up boot settings before changing them. Wrong kernel parameters, EFI paths, boot order, NVRAM writes, or `/etc/boot` configuration can leave a machine unable to boot without firmware or live-media recovery.