Provided by: efibootmgr_0.12-4_amd64 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)