This is efibootmgr, a Linux user-space application 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 above, available from http://developer.intel.com.

Note: efibootmgr requires that the kernel module efivars be loaded
prior to use.  'modprobe efivars' should do the trick.

usage: efibootmgr [options]
	-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      (defaults to /dev/sda) containing loader
	-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 w/ invalid PMBR to be treated as GPT 
	-H | --acpi_hid XXXX  set the ACPI HID (used with -i)
	-i | --iface name     create a netboot entry for the named interface
	-l | --loader name    (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)
	-O | --delete-bootorder delete BootOrder
	-p | --part part       (defaults to 1) containing loader
	-q | --quiet           be quiet
	--test filename   don't write to NVRAM, write to filename
	-t | --timeout seconds   Boot manager timeout
	-T | --delete-timeout    delete Timeout value
	-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
	-V | --version         return version and exit
	-w | --write-signature  write unique sig to MBR if needed
        -@ | --append-binary-args   append extra variable args from
			   	    file (use - to read from stdin).  


Typical usage:
1) Root can use it to display the current Boot Manager settings.
  [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.

  BootOr                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 