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
-C | --create-only create new variable bootnum and do not add to bootorder
-D | --remove-dups remove duplicate values from 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 with invalid PMBR to be treated as GPT
-i | --iface name create a netboot entry for the named interface
-l | --loader name (defaults to \EFI\redhat\grub.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
-t | --timeout seconds set boot manager timeout waiting for user input.
-T | --delete-timeout delete Timeout.
-u | --unicode | --UCS-2 pass extra args as UCS-2 (default is ASCII)
-v | --verbose print additional information
-V | --version return version and exit
-w | --write-signature write unique sig to MBR if needed
-@ | --append-binary-args file append extra args from file (use "-" for stdin)
-h | --help show help/usage