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NAME | SYNOPSIS | DESCRIPTION | COMMANDS | OPTIONS | EXIT STATUS | ENVIRONMENT | SEE ALSO | NOTES | COLOPHON |
BOOTCTL(1) bootctl BOOTCTL(1)
bootctl - Control the firmware and boot manager settings
bootctl [OPTIONS...] {COMMAND}
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.
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 [STRING]
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.
reboot-to-firmware [BOOL]
Query or set the "Reboot-Into-Firmware-Setup" flag of the EFI
firmware. Takes a boolean argument which controls whether to show
the firmware setup on next system reboot. If the argument is
omitted shows the current status of the flag, or whether the flag
is supported. This controls the same flag as systemctl reboot
--firmware-setup, but is more low-level and allows setting the
flag independently from actually requesting a reboot.
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.
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.
On success, 0 is returned, a non-zero failure code otherwise.
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.
systemd-boot(7), Boot Loader Specification[2], Boot Loader
Interface[3], systemd-boot-system-token.service(8)
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
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2020-08-13. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2020-08-11.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
systemd 246 BOOTCTL(1)
Pages that refer to this page: loader.conf(5) , 30-systemd-environment-d-generator(7) , kernel-command-line(7) , sd-boot(7) , systemd-boot(7) , systemd.directives(7) , systemd.index(7) , systemd-boot-system-token.service(8)