Provided by: efibootmgr_0.12-4_i386 bug

NAME

       efibootmgr - manipulate the EFI Boot Manager

SYNOPSIS

       efibootmgr  [  -a ] [ -A ] [ -b XXXX ] [ -B XXXX ] [ -c ] [ -d DISK ] [
       -D ] [ -e 1|3|-1 ] [ -E NUM ] [ -g ] [ -H XXXX ] [ -i NAME ] [ -l  NAME
       ] [ -L LABEL ] [ -n XXXX ] [ -N ] [ -o XXXX,YYYY,ZZZZ ... ] [ -O ] [ -p
       PART ] [ -q ] [ -t seconds ] [ -T ] [ -u ] [ -U XXXX ] [ -v ] [ -V ]  [
       -w ] [ -@ file ]

DESCRIPTION

       efibootmgr  is  a  userspace  application  used  to  modify  the  Intel
       Extensible Firmware Interface (EFI) Boot Manager.  This application can
       create and destroy boot entries, change the boot order, change the next
       running boot option, and more.

       Details  on  the  EFI  Boot  Manager  are  available   from   the   EFI
       Specification, v1.02 or later, available from:
        <URL:http://developer.intel.com>

              Note:  efibootmgr requires that the kernel support access to EFI
              non-volatile   variables   through   /sys/firmware/efi/vars   or
              /sys/firmware/efi/efivars/.

OPTIONS

       The following is a list of options accepted by efibootmgr:

       -a | --active
              Sets bootnum active

       -A | --inactive
              Sets bootnum inactive

       -b | --bootnum XXXX
              Modify BootXXXX (hex)

       -B | --delete-bootnum
              Delete bootnum (hex)

       -c | --create
              Create new variable bootnum and add to bootorder

       -d | --disk DISK
              The disk containing the loader (defaults to /dev/sda)

       -D | --remove-dups
              Remove duplicated entries from BootOrder

       -e | --edd30 1|3|-1
              Force EDD 1.0 or 3.0 creation variables, or guess.

       -E | --edd-device NUM
              EDD 1.0 device number (defaults to 0x80)

       -g | --gpt
              Force disk with invalid PMBR to be treated as GPT

       -i | --iface NAME
              create a netboot entry for the named interface

       -l | --loader NAME
              Specify a loader (defaults to \\elilo.efi)

       -L | --label LABEL
              Boot manager display label (defaults to "Linux")

       -n | --bootnext XXXX
              Set BootNext to XXXX (hex)

       -N | --delete-bootnext
              Delete BootNext

       -o | --bootorder XXXX,YYYY,ZZZZ
              Explicitly  set  BootOrder  (hex).   Any value from 0 to FFFF is
              accepted so long as  it  corresponds  to  an  existing  Boot####
              variable, and zero padding is not required.

       -O | --delete-bootorder
              Delete BootOrder

       -p | --part PART
              Partition number containing the bootloader (defaults to 1)

       -q | --quiet
              Quiet mode - supresses output.

       -t | --timeout seconds
              Boot Manager timeout, in seconds.

       -T | --delete-timeout
              Delete Timeout variable.

       -u | --unicode | --UCS-2
              pass extra command line arguments as UCS-2 (default is ASCII)

       -v | --verbose
              Verbose mode - prints additional information

       -V | --version
              Just print version string and exit.

       -w | --write-signature
              write unique signature to the MBR if needed

       -@ | --append-binary-args
              append extra variable args from file (use - to read from stdin).
              Data in file is appended as command line arguments to  the  boot
              loader  command,  with  no  modification to the data, so you can
              pass any binary or text data necessary.

EXAMPLES

       1.

   DISPLAYING THE CURRENT SETTINGS (MUST BE ROOT).
       [root@localhost ~]# efibootmgr
       BootCurrent: 0004
       BootNext: 0003
       BootOrder: 0004,0000,0001,0002,0003
       Timeout: 30 seconds
       Boot0000* Diskette Drive(device:0)
       Boot0001* CD-ROM Drive(device:FF)
       Boot0002* Hard Drive(Device:80)/HD(Part1,Sig00112233)
       Boot0003* PXE Boot: MAC(00D0B7C15D91)
       Boot0004* Linux

       This shows:

              · BootCurrent - the boot  entry  used  to  start  the  currently
                running system

              · BootOrder  -  the  boot  order  as  would  appear  in the boot
                manager.  The boot manager tries  to  boot  the  first  active
                entry in this list.  If unsuccessful, it tries the next entry,
                and so on.

              · BootNext - the boot entry which is scheduled to be run on next
                boot.   This  supercedes  BootOrder  for one boot only, and is
                deleted by the boot manager after first use.  This allows  you
                to change the next boot behavior without changing BootOrder.

              · Timeout  -  the  time in seconds between when the boot manager
                appears on the screen until when it automatically chooses  the
                startup value from BootNext or BootOrder.

              · Five   boot   entries   (0000   -   0004),   along   with  the
                active/inactive flag (* means active) and the  name  displayed
                on the screen.

       2.

   CREATING A NEW BOOT OPTION
       An  OS installer would call efibootmgr -c.  This assumes that /boot/efi
       is your EFI System  Partition,  and  is  mounted  at  /dev/sda1.   This
       creates  a  new  boot option, called "Linux", and puts it at the top of
       the boot order list.  Options may  be  passed  to  modify  the  default
       behavior.  The default OS Loader is elilo.efi.

       3.

   CHANGING THE BOOT ORDER
       Assuming  the  configuration  in Example #1, efibootmgr -o 3,4 could be
       called to specify PXE boot first, then Linux boot.

       4.

   CHANGING THE BOOT ORDER FOR THE NEXT BOOT ONLY
       Assuming the configuration in Example #1,  efibootmgr  -n  4  could  be
       called to specify that the Linux entry be taken on next boot.

       5.

   DELETING A BOOT OPTION
       Assuming  the  configuration in Example #1, efibootmgr -b 4 -B could be
       called to delete entry 4 and remove it from the BootOrder.

       6.

   CREATING NETWORK BOOT ENTRIES
       A system administrator wants to create a boot option to  network  boot.
       You  create  the boot entry with: efibootmgr -c -i eth0 -L netboot [ -l
       '\filename.efi' ]

BUGS

       Please direct  any  bugs,  features,  patches,  etc.  to  Peter  Jones:
       https://github.com/rhinstaller/efibootmgr .

AUTHOR

       This  man page was generated by dann frazier <dannf@debian.org> for the
       Debian GNU/Linux operating system, but may be used by others.

SEE ALSO

       elilo(1)

                                11 January 2012                  EFIBOOTMGR(8)