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EFIBOOTMGR(8)		FreeBSD	System Manager's Manual		 EFIBOOTMGR(8)

     efibootmgr	-- manipulate the EFI Boot Manager

     [-aAnNB Bootvar] [-t timeout] [-T]	[-o bootorder] [-verbose]
     [-c --k kernel -l loader [-L label] [--dry-run] [-b Bootvar]]

     efibootmgr	manipulates how	UEFI Boot Managers boot	the system.  Methods
     of	booting	can be created and destroyed.  Boot methods can	be activated
     or	deactivated.  The order	of boot	methods	tried can be changed.  Tempo-
     rary boot methods can override the	usual booting methods.

     The UEFI standard defines how hosts may control what is used to bootstrap
     the system.  Each method is encapsulated within a persistent UEFI vari-
     able, stored by the UEFI BIOS of the form BootXXXX.  These	variables are
     numbered, describe	where to load the bootstrap program from, and whether
     or	not the	method is active.  The boot order of these methods is con-
     trolled by	another	variable BootOrder.  The currently booting method is
     communicated using	BootCurrent.  A	global timeout can also	be set.

     efibootmgr	requires that the kernel efirt module to get and set these
     non-volatile variables.

     The following options are available:

     -c	--create		   Create a new	Boot Variable

     -l	--loader loader		   The path to and name	of the loader.

     -k	--kernel kernel		   The path to and name	of the kernel.

     -b	-Bootvar		   When	creating an entry, use Bootvar as the
				   index.  Fail	if it already exists.

     -L	--label	label		   An optional description for the entry.

     -D	--dry-run		   Process but do not set the given BootVar.

     -B	--delete BootVarNum	   Delete the given BootVar Num.

     -a	--activate BootVarNum	   Activate the	given BootVarNum.

     -A	--deactivate BootVarNum	   Deactivate the given	BootVarNum.

     -n	--bootnext BootVarNum	   Set BootVarNum as the BootNext variable.

     -N	--delete-bootnext	   Delete the BootNext optional	BootVar.

     -o	--bootorder bootorder	   Set BootOrder variable to the given comma
				   delimited set of BootVarNums.  The numbers
				   are in hex to match BootXXXX, but may omit
				   leading zeros.

     -t	--set-timeout timeout	   Set the bootmenu timeout value.

     -T	--del-timeout		   Delete the BootTimeout variable.

     -v	--verbose		   Display the device path of BootVars in the

     To	Display	the current Boot related variables in the system:

	   efibootmgr [-v]

     This will display the optional BootNext BootVar, BootCurrent, or cur-
     rently booted BootVar, followed by	the optional Timeout value, any
     BootOrder that maybe set, followed	finally	by all currently defined Boot
     variables,	active or not. The verbose flag	will augment this output with
     the hardrive partition uuids, size/offset and device-path of the vari-

     The efibootmgr program can	be used	to create new EFI boot variables. To
     create a new boot var pointing to an installation with its	EFI partition
     mounted under /mnt, the given loader and a	label "FreeBSD-11":

	   efibootmgr -c -l /mnt/EFI/BOOT/BOOTX64.EFI -L FreeBSD-11

     This will result in the next available BootVarNum being assigned to a new
     UEFI load variable, and given the label "FreeBSD-11" such as:

	   Boot0009 FreeBSD-11

     Note newly	created	BootVars are created inactive. The active state	is de-
     noted by an '*' following the BootVar name	in the output.	They are also
     inserted into the first position of current BootOrder variable if it ex-
     ists. They	must first be set to active before being considered available
     to	attempt	booting	from, else they	are ignored.

	   efibootmgr -B 0009

     Will delete the given BootVar Boot0009

     To	set a given newly created BootVar active use:

	   efibootmgr -a 0009

     To	set a given BootVar to be used as the BootNext variable, irrespective
     of	its active state, use:

	   efibootmgr -n 0009

     To	set the	BootOrder for the next reboot  use:

	   efibootmgr -o 0009,0003,...

     efivar(8),	uefi(8), gpart(8)

FreeBSD	13.0			  May 8, 2018			  FreeBSD 13.0


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