1LOADER.CONF(5) loader.conf LOADER.CONF(5)
2
6 loader.conf - Configuration file for systemd-boot
7
9 ESP/loader/loader.conf, ESP/loader/entries/*.conf
10
12 systemd-boot(7) will read ESP/loader/loader.conf and any files with the
13 ".conf" extension under ESP/loader/entries/ on the EFI system partition
14 (ESP).
15 Each configuration file must consist of an option name, followed by
17 whitespace, and the option value. "#" may be used to start a comment
18 line. Empty and comment lines are ignored.
19 Boolean arguments may be written as "yes"/"y"/"true"/"1" or
21 "no"/"n"/"false"/"0".
22
24 The following configuration options in loader.conf are understood:
25 default
27 A glob pattern to select the default entry. The default entry may
28 be changed in the boot menu itself, in which case the name of the
29 selected entry will be stored as an EFI variable, overriding this
30 option.
31 timeout
33 How long the boot menu should be shown before the default entry is
34 booted, in seconds. This may be changed in the boot menu itself and
35 will be stored as an EFI variable in that case, overriding this
36 option.
37 If the timeout is disabled, the default entry will be booted
39 immediately. The menu can be shown by pressing and holding a key
40 before systemd-boot is launched.
41 console-mode
43 This option configures the resolution of the console. Takes a
44 number or one of the special values listed below. The following
45 values may be used:
46 0
48 Standard UEFI 80x25 mode
49 1
51 80x50 mode, not supported by all devices
52 2
54 the first non-standard mode provided by the device firmware, if
55 any
56 auto
58 Pick a suitable mode automatically using heuristics
59 max
61 Pick the highest-numbered available mode
62 keep
64 Keep the mode selected by firmware (the default)
65 editor
67 Takes a boolean argument. Enable (the default) or disable the
68 editor. The editor should be disabled if the machine can be
69 accessed by unauthorized persons.
70 auto-entries
72 Takes a boolean argument. Enable (the default) or disable entries
73 for other boot entries found on the boot partition. In particular,
74 this may be useful when loader entries are created to show
75 replacement descriptions for those entries.
76 auto-firmware
78 Takes a boolean argument. Enable (the default) or disable the
79 "Reboot into firmware" entry.
80 random-seed-mode
82 Takes one of "off", "with-system-token" and "always". If "off" no
83 random seed data is read off the ESP, nor passed to the OS. If
84 "with-system-token" (the default) systemd-boot will read a random
85 seed from the ESP (from the file /loader/random-seed) only if the
86 LoaderSystemToken EFI variable is set, and then derive the random
87 seed to pass to the OS from the combination. If "always" the boot
88 loader will do so even if LoaderSystemToken is not set. This mode
89 is useful in environments where protection against OS image reuse
90 is not a concern, and the random seed shall be used even with no
91 further setup in place. User bootctl random-seed to initialize both
92 the random seed file in the ESP and the system token EFI variable.
93 See Random Seeds[1] for further information.
95
97 # /boot/efi/loader/loader.conf
98 timeout 0
99 default 01234567890abcdef1234567890abdf0-*
100 editor no
101 The menu will not be shown by default (the menu can still be shown by
104 pressing and holding a key during boot). One of the entries with files
105 with a name starting with "01234567890abcdef1234567890abdf0-" will be
106 selected by default. If more than one entry matches, the one with the
107 highest priority will be selected (generally the one with the highest
108 version number). The editor will be disabled, so it is not possible to
109 alter the kernel command line.
110
112 systemd-boot(7), bootctl(1)
113
115 1. Random Seeds
116 https://systemd.io/RANDOM_SEEDS
117systemd 245 LOADER.CONF(5)