Provided by: systemd_245.4-4ubuntu3.24_amd64 bug

NAME

       bootctl - Control the firmware and boot manager settings

SYNOPSIS


       bootctl [OPTIONS...] {COMMAND}

DESCRIPTION

       bootctl can check the EFI boot loader status, list available boot loaders and boot loader entries, and
       install, update, or remove the systemd-boot(7) boot loader on the current system.

COMMANDS

       status
           Shows brief information about the system firmware, the boot loader that was used to boot the system,
           the boot loaders currently available in the ESP, the boot loaders listed in the firmware's list of
           boot loaders and the current default boot loader entry. If no command is specified, this is the
           implied default.

       install
           Installs systemd-boot into the EFI system partition. A copy of systemd-boot will be stored as the EFI
           default/fallback loader at ESP/EFI/BOOT/BOOT*.EFI. The boot loader is then added to the top of the
           firmware's boot loader list.

       update
           Updates all installed versions of systemd-boot(7), if the available version is newer than the version
           installed in the EFI system partition. This also includes the EFI default/fallback loader at
           ESP/EFI/BOOT/BOOT*.EFI. The boot loader is then added to end of the firmware's boot loader list if
           missing.

       remove
           Removes all installed versions of systemd-boot from the EFI system partition and the firmware's boot
           loader list.

       is-installed
           Checks whether systemd-boot is installed in the ESP. Note that a single ESP might host multiple boot
           loaders; this hence checks whether systemd-boot is one (of possibly many) installed boot loaders —
           and neither whether it is the default nor whether it is registered in any EFI variables.

       random-seed
           Generates a random seed and stores it in the EFI System Partition, for use by the systemd-boot boot
           loader. Also, generates a random 'system token' and stores it persistently as an EFI variable, if one
           has not been set before. If the boot loader finds the random seed in the ESP and the system token in
           the EFI variable it will derive a random seed to pass to the OS and a new seed to store in the ESP
           from the combination of both. The random seed passed to the OS is credited to the kernel's entropy
           pool by the system manager during early boot, and permits userspace to boot up with an entropy pool
           fully initialized very early on. Also see systemd-boot-system-token.service(8).

           See Random Seeds[1] for further information.

       systemd-efi-options [VALUE]
           When called without the optional argument, prints the current value of the "SystemdOptions" EFI
           variable. When called with an argument, sets the variable to that value. See systemd(1) for the
           meaning of that variable.

       list
           Shows all available boot loader entries implementing the Boot Loader Specification[2], as well as any
           other entries discovered or automatically generated by the boot loader.

       set-default ID, set-oneshot ID
           Sets the default boot loader entry. Takes a single boot loader entry ID string as argument. The
           set-oneshot command will set the default entry only for the next boot, the set-default will set it
           persistently for all future boots.

OPTIONS

       The following options are understood:

       --esp-path=
           Path to the EFI System Partition (ESP). If not specified, /efi/, /boot/, and /boot/efi/ are checked
           in turn. It is recommended to mount the ESP to /efi/, if possible.

       --boot-path=
           Path to the Extended Boot Loader partition, as defined in the Boot Loader Specification[2]. If not
           specified, /boot/ is checked. It is recommended to mount the Extended Boot Loader partition to
           /boot/, if possible.

       -p, --print-esp-path
           This option modifies the behaviour of status. Only prints the path to the EFI System Partition (ESP)
           to standard output and exits.

       -x, --print-boot-path
           This option modifies the behaviour of status. Only prints the path to the Extended Boot Loader
           partition if it exists, and the path to the ESP otherwise to standard output and exit. This command
           is useful to determine where to place boot loader entries, as they are preferably placed in the
           Extended Boot Loader partition if it exists and in the ESP otherwise.

           Boot Loader Specification Type #1 entries should generally be placed in the directory "$(bootctl
           -x)/loader/entries/". Existence of that directory may also be used as indication that boot loader
           entry support is available on the system. Similarly, Boot Loader Specification Type #2 entries should
           be placed in the directory "$(bootctl -x)/EFI/Linux/".

           Note that this option (similar to the --print-booth-path option mentioned above), is available
           independently from the boot loader used, i.e. also without systemd-boot being installed.

       --no-variables
           Do not touch the firmware's boot loader list stored in EFI variables.

       --graceful
           Ignore failure when the EFI System Partition cannot be found, or when EFI variables cannot be
           written. Currently only applies to random seed operations.

       --no-pager
           Do not pipe output into a pager.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

EXIT STATUS

       On success, 0 is returned, a non-zero failure code otherwise.

ENVIRONMENT

       If $SYSTEMD_RELAX_ESP_CHECKS=1 is set the validation checks for the ESP are relaxed, and the path
       specified with --esp-path= may refer to any kind of file system on any kind of partition.

       Similarly, $SYSTEMD_RELAX_XBOOTLDR_CHECKS=1 turns off some validation checks for the Extended Boot Loader
       partition.

SEE ALSO

       systemd-boot(7), Boot Loader Specification[2], Boot Loader Interface[3], systemd-boot-system-
       token.service(8)

NOTES

        1. Random Seeds
           https://systemd.io/RANDOM_SEEDS

        2. Boot Loader Specification
           https://systemd.io/BOOT_LOADER_SPECIFICATION

        3. Boot Loader Interface
           https://systemd.io/BOOT_LOADER_INTERFACE

systemd 245                                                                                           BOOTCTL(1)