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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLE | SEE ALSO | NOTES | COLOPHON |
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LOADER.CONF(5) loader.conf LOADER.CONF(5)
loader.conf - Configuration file for systemd-boot
ESP/loader/loader.conf, ESP/loader/entries/*.conf
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"/"t"/"on"/"1"
or "no"/"n"/"false"/"f"/"off"/"0".
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.
Table 1. Automatically detected entries will use the
following names:
┌──────────────────────────────┬──────────────────────┐
│Name │ Description │
├──────────────────────────────┼──────────────────────┤
│auto-efi-default │ EFI Default Loader │
├──────────────────────────────┼──────────────────────┤
│auto-efi-shell │ EFI Shell │
├──────────────────────────────┼──────────────────────┤
│auto-osx │ macOS │
├──────────────────────────────┼──────────────────────┤
│auto-reboot-to-firmware-setup │ Reboot Into Firmware │
│ │ Interface │
├──────────────────────────────┼──────────────────────┤
│auto-windows │ Windows Boot Manager │
└──────────────────────────────┴──────────────────────┘
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. Use 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.
# /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.
systemd-boot(7), bootctl(1)
1. Random Seeds
https://systemd.io/RANDOM_SEEDS
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 2021-08-27. (At that
time, the date of the most recent commit that was found in the
repository was 2021-08-27.) 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 249 LOADER.CONF(5)
Pages that refer to this page: systemd-boot(7)
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