loader.conf(5)

LOADER.CONF(5)                    loader.conf                   LOADER.CONF(5)

NAME
       loader.conf - Configuration file for systemd-boot

SYNOPSIS
       ESP/loader/loader.conf, ESP/loader/entries/*.conf

DESCRIPTION
       systemd-boot(7) will read ESP/loader/loader.conf and any files with the
       ".conf" extension under ESP/loader/entries/ on the EFI system partition
       (ESP).

       Each configuration file must consist of an option name, followed by
       whitespace, and the option value.  "#" may be used to start a comment
       line. Empty and comment lines are ignored.

       Boolean arguments may be written as "yes"/"y"/"true"/"1" or
       "no"/"n"/"false"/"0".

OPTIONS
       The following configuration options in loader.conf are understood:

       default
           A glob pattern to select the default entry. The default entry may
           be changed in the boot menu itself, in which case the name of the
           selected entry will be stored as an EFI variable, overriding this
           option.

       timeout
           How long the boot menu should be shown before the default entry is
           booted, in seconds. This may be changed in the boot menu itself and
           will be stored as an EFI variable in that case, overriding this
           option.

           If the timeout is disabled, the default entry will be booted
           immediately. The menu can be shown by pressing and holding a key
           before systemd-boot is launched.

       console-mode
           This option configures the resolution of the console. Takes a
           number or one of the special values listed below. The following
           values may be used:

           0
               Standard UEFI 80x25 mode

           1
               80x50 mode, not supported by all devices

           2
               the first non-standard mode provided by the device firmware, if
               any

           auto
               Pick a suitable mode automatically using heuristics

           max
               Pick the highest-numbered available mode

           keep
               Keep the mode selected by firmware (the default)

       editor
           Takes a boolean argument. Enable (the default) or disable the
           editor. The editor should be disabled if the machine can be
           accessed by unauthorized persons.

       auto-entries
           Takes a boolean argument. Enable (the default) or disable entries
           for other boot entries found on the boot partition. In particular,
           this may be useful when loader entries are created to show
           replacement descriptions for those entries.

       auto-firmware
           Takes a boolean argument. Enable (the default) or disable the
           "Reboot into firmware" entry.

       random-seed-mode
           Takes one of "off", "with-system-token" and "always". If "off" no
           random seed data is read off the ESP, nor passed to the OS. If
           "with-system-token" (the default) systemd-boot will read a random
           seed from the ESP (from the file /loader/random-seed) only if the
           LoaderSystemToken EFI variable is set, and then derive the random
           seed to pass to the OS from the combination. If "always" the boot
           loader will do so even if LoaderSystemToken is not set. This mode
           is useful in environments where protection against OS image reuse
           is not a concern, and the random seed shall be used even with no
           further setup in place. User bootctl random-seed to initialize both
           the random seed file in the ESP and the system token EFI variable.

           See Random Seeds[1] for further information.

EXAMPLE
           # /boot/efi/loader/loader.conf
           timeout 0
           default 01234567890abcdef1234567890abdf0-*
           editor no

       The menu will not be shown by default (the menu can still be shown by
       pressing and holding a key during boot). One of the entries with files
       with a name starting with "01234567890abcdef1234567890abdf0-" will be
       selected by default. If more than one entry matches, the one with the
       highest priority will be selected (generally the one with the highest
       version number). The editor will be disabled, so it is not possible to
       alter the kernel command line.

SEE ALSO
       systemd-boot(7), bootctl(1)

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

systemd 245                                                     LOADER.CONF(5)