bootloaderidGRUB

bootloaderidGRUB is an internal identifier used by certain boot management tools to reference a GRUB boot entry. It serves as a stable mapping token that links a firmware boot option to a specific configuration within GRUB’s menu system. The term is not a formal part of GRUB itself, but appears in tooling and documentation that implement a mapping layer between UEFI/legacy boot entries and GRUB's configuration files.

In practice, bootloaderidGRUB may be stored in a boot manager database, in EFI NVRAM, or in a dedicated configuration file used by the controlling tool. It is typically generated during installation or when GRUB is updated, and is intended to remain valid across subsequent reconfigurations that do not alter the underlying mapping. The identifier facilitates automated boot selection, multi-boot management, and scripted references to a particular GRUB entry without depending on the potentially changing human-readable entry names.

Management considerations include keeping the mapping in sync with the GRUB configuration. If the mapping becomes out of date, boot entries may fail to load or present incorrect options. Tools that manage boot entries can usually repair or regenerate the mapping by rereading the current GRUB configuration and updating the associated bootloaderidGRUB value accordingly.

See also: GRUB, bootloader, EFI/UEFI, systemd-boot, efibootmgr.