efibootdump

UEFI boot entry decoder

TLDR

Dump boot entries from file

$ efibootdump -f [/sys/firmware/efi/efivars/Boot0000-8be4df61-93ca-11d2-aa0d-00e098032b8c]

Dump a boot entry by variable name

$ efibootdump [Boot0000]

SYNOPSIS

efibootdump [-f|--file] variable|file...

efibootdump decodes EFI load options such as Boot0000 or BootOrder and prints them in human-readable form: the description, attributes, and the device path of the loader.It accepts either the name of a boot variable, which it reads from the running firmware, or a file containing the raw variable data when -f is given. This makes it useful both for inspecting the live boot configuration and for examining a variable dumped from another machine.

PARAMETERS

variable|file

The boot variable name, or a file path when -f is used.

-f, --file

Treat the arguments as files containing raw variable data rather than variable names.

INSTALL

sudo apt install efibootmgr

sudo dnf install efibootmgr

sudo pacman -S efibootmgr

sudo apk add efibootmgr

sudo zypper install efibootmgr

nix profile install nixpkgs#efibootmgr

CAVEATS

Only works on UEFI systems, and reading live variables requires efivarfs to be mounted at /sys/firmware/efi/efivars. Part of the efivar package, not efibootmgr, so it may need to be installed separately. Root privileges are usually needed to read the raw variable files.

RESOURCES

Source code