efibootmgr

Synopsis

efibootmgr [command]... [option]...

Description

The efibootmgr utility is used from a script file to manage the EFI Boot variables. The efibootmgr utility is used for creating or destroying the EFI BOOT variables and to update the BOOT NEXT, BOOT ORDER and TIMEOUT variables.The BOOT ORDER variable defines the boot entries sequence to be shown in menu. The TIMEOUT variable sets the time-out to select automatically the boot variables, according to BOOT ORDER. The BOOT NEXT variable sets the next boot entry to be selected automatically disregarding the BOOT ORDER and TIMEOUT.

Table 6-9 Options

Options	Description
-a \| --active	Set bootnum active.
-A \| --inactive	Set bootnum inactive.
-B \| --delete-bootnum	Delete bootnum (hex).
-c \| --create	Create new variable bootnum and add to bootorder.
-h \| --help	Display the help and exit.
-i \| --iface name	Create a netboot entry for the named interface.
-n \| --bootnext XXXX	Set BootNext to XXXX (hex).
-N \| --delete-bootnext	Delete BootNext.
-o \| --bootorder XXXX,YYYY,ZZZZ,...	Explicitly set BootOrder. The values must be in hex.
-O \| --delete-bootorder	Delete BootOrder
-t \| --timeout seconds	Set boot manager timeout waiting for user input.
-T \| --delete-timeout	Delete Timeout.
-V \| --version	Return version and exit.

Table 6-10 Commands

Commands	Description
-@ \| --@ file	Define the file to include more options.
-b \| --bootnum XXXX	Select `BootXXXX` (hex) variable to be deleted.
-d \| --disk disk	Device file that the boot loader stores. (defaults to `/dev/sda`).
-e \| --edd [1\|3\|-1]	Force EDD 1.0 or 3.0 creation variables, or guess.
-E \| --device num	EDD 1.0 device number (defaults to 0x80).
-g \| --gpt	Force disk with invalid PMBR to be treated as GPT.
-H \| --acpi_hid XXXX	Set the ACPI HID (used with -i).
-l \| --loader name	Boot loader file name. The full path must be informed if necessary. (defaults to `\elilo.efi`).
-L \| --label label	Boot manager display label (defaults to "Linux").
-p \| --part part	Partition number that containing boot loader (defaults to 1)
-q \| --quiet	Be quiet.
--test filename	Do not write to NVRAM, writes to filename.
-u \| --unicode \| --UCS-2	Pass extra args as UCS-2 (default is ASCII).
-U \| --acpi_uid XXXX	Set the ACPI UID (used with -i).
-v \| --verbose	Print additional information.
-w \| --write-signature	Write unique sig to MBR if needed.

Table 6-11 Command Line Input

Command Line Input	Result
efibootmgr	Show the current configuration.
efibootmgr -c	Create a default boot entry with the following values: `NAME: Linux` `DEVICE: /dev/sda` `PARTITION: 1` `BOOT LOADER: /elilo.efi` `LOAD OPTION: none`
efibootmgr -c -L "New Boot" -l /efi/boot/bootia64.efi -d /dev/cciss/c0d0 -p 4 LINUX	Create a boot entry with following values: `NAME: New Boot` `DEVICE: /dev/cciss/c0d0` `PARTITION: 4` `BOOT LOADER: /efi/boot/bootia64.efi` `LOAD OPTION: LINUX`
efibootmgr -c -L "Boot" -l /bootia64.efi --test bootentry.bin	Generate a boot entry but do not save it in `NVRAM`. The boot entry values are: `NAME: Boot` `DEVICE: /dev/sda` `PARTITION: 1` `BOOT LOADER: /bootia64.efi` LOAD OPTION: none
efibootmgr -c -l /bootia64.efi -@ parameter.txt	Create a boot entry with the following values: `NAME: Linux` `DEVICE: /dev/sda` `PARTITION: 1` `BOOT LOADER: /bootia64.efi` `LOAD OPTION:` data into the `parameter.txt` file
efibootmgr -B -b 0002	Delete the second boot entry (`BOOT0002`).
efibootmgr -n 0005	Set the fifth boot entry (`BOOT0005`) to `BOOT NEXT`.
efibootmgr -o 0002,0005,0001	Define the new `BOOT ORDER` value.
efibootmgr -t 5	Set time-out to 5 seconds.
efibootmgr -O -N -T	Delete the `BOOT NEXT`, `BOOT ORDER` and `TIMEOUT` values.

efibootmgr

Technical documentation

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Synopsis

Description