1BOOTCTL(1) bootctl BOOTCTL(1)
2
6 bootctl - Control the firmware and boot manager settings
7
9 bootctl [OPTIONS...] {COMMAND}
10
12 bootctl can check the EFI boot loader status, list available boot
13 loaders and boot loader entries, and install, update, or remove the
14 systemd-boot(7) boot loader on the current system.
15
17 status
18 Shows brief information about the system firmware, the boot loader
19 that was used to boot the system, the boot loaders currently
20 available in the ESP, the boot loaders listed in the firmware's
21 list of boot loaders and the current default boot loader entry. If
22 no command is specified, this is the implied default.
23 install
25 Installs systemd-boot into the EFI system partition. A copy of
26 systemd-boot will be stored as the EFI default/fallback loader at
27 ESP/EFI/BOOT/BOOT*.EFI. The boot loader is then added to the top of
28 the firmware's boot loader list.
29 update
31 Updates all installed versions of systemd-boot(7), if the available
32 version is newer than the version installed in the EFI system
33 partition. This also includes the EFI default/fallback loader at
34 ESP/EFI/BOOT/BOOT*.EFI. The boot loader is then added to end of the
35 firmware's boot loader list if missing.
36 remove
38 Removes all installed versions of systemd-boot from the EFI system
39 partition and the firmware's boot loader list.
40 is-installed
42 Checks whether systemd-boot is installed in the ESP. Note that a
43 single ESP might host multiple boot loaders; this hence checks
44 whether systemd-boot is one (of possibly many) installed boot
45 loaders — and neither whether it is the default nor whether it is
46 registered in any EFI variables.
47 random-seed
49 Generates a random seed and stores it in the EFI System Partition,
50 for use by the systemd-boot boot loader. Also, generates a random
51 'system token' and stores it persistently as an EFI variable, if
52 one has not been set before. If the boot loader finds the random
53 seed in the ESP and the system token in the EFI variable it will
54 derive a random seed to pass to the OS and a new seed to store in
55 the ESP from the combination of both. The random seed passed to the
56 OS is credited to the kernel's entropy pool by the system manager
57 during early boot, and permits userspace to boot up with an entropy
58 pool fully initialized very early on. Also see systemd-boot-system-
59 token.service(8).
60 See Random Seeds[1] for further information.
62 systemd-efi-options [STRING]
64 When called without the optional argument, prints the current value
65 of the "SystemdOptions" EFI variable. When called with an argument,
66 sets the variable to that value. See systemd(1) for the meaning of
67 that variable.
68 reboot-to-firmware [BOOL]
70 Query or set the "Reboot-Into-Firmware-Setup" flag of the EFI
71 firmware. Takes a boolean argument which controls whether to show
72 the firmware setup on next system reboot. If the argument is
73 omitted shows the current status of the flag, or whether the flag
74 is supported. This controls the same flag as systemctl reboot
75 --firmware-setup, but is more low-level and allows setting the flag
76 independently from actually requesting a reboot.
77 list
79 Shows all available boot loader entries implementing the Boot
80 Loader Specification[2], as well as any other entries discovered or
81 automatically generated by the boot loader.
82 set-default ID, set-oneshot ID
84 Sets the default boot loader entry. Takes a single boot loader
85 entry ID string as argument. The set-oneshot command will set the
86 default entry only for the next boot, the set-default will set it
87 persistently for all future boots.
88
90 The following options are understood:
91 --esp-path=
93 Path to the EFI System Partition (ESP). If not specified, /efi/,
94 /boot/, and /boot/efi/ are checked in turn. It is recommended to
95 mount the ESP to /efi/, if possible.
96 --boot-path=
98 Path to the Extended Boot Loader partition, as defined in the Boot
99 Loader Specification[2]. If not specified, /boot/ is checked. It is
100 recommended to mount the Extended Boot Loader partition to /boot/,
101 if possible.
102 -p, --print-esp-path
104 This option modifies the behaviour of status. Only prints the path
105 to the EFI System Partition (ESP) to standard output and exits.
106 -x, --print-boot-path
108 This option modifies the behaviour of status. Only prints the path
109 to the Extended Boot Loader partition if it exists, and the path to
110 the ESP otherwise to standard output and exit. This command is
111 useful to determine where to place boot loader entries, as they are
112 preferably placed in the Extended Boot Loader partition if it
113 exists and in the ESP otherwise.
114 Boot Loader Specification Type #1 entries should generally be
116 placed in the directory "$(bootctl -x)/loader/entries/". Existence
117 of that directory may also be used as indication that boot loader
118 entry support is available on the system. Similarly, Boot Loader
119 Specification Type #2 entries should be placed in the directory
120 "$(bootctl -x)/EFI/Linux/".
121 Note that this option (similar to the --print-booth-path option
123 mentioned above), is available independently from the boot loader
124 used, i.e. also without systemd-boot being installed.
125 --no-variables
127 Do not touch the firmware's boot loader list stored in EFI
128 variables.
129 --graceful
131 Ignore failure when the EFI System Partition cannot be found, or
132 when EFI variables cannot be written. Currently only applies to
133 random seed operations.
134 --no-pager
136 Do not pipe output into a pager.
137 -h, --help
139 Print a short help text and exit.
140 --version
142 Print a short version string and exit.
143
145 On success, 0 is returned, a non-zero failure code otherwise.
146
148 If $SYSTEMD_RELAX_ESP_CHECKS=1 is set the validation checks for the ESP
149 are relaxed, and the path specified with --esp-path= may refer to any
150 kind of file system on any kind of partition.
151 Similarly, $SYSTEMD_RELAX_XBOOTLDR_CHECKS=1 turns off some validation
153 checks for the Extended Boot Loader partition.
154
156 systemd-boot(7), Boot Loader Specification[2], Boot Loader
157 Interface[3], systemd-boot-system-token.service(8)
158
160 1. Random Seeds
161 https://systemd.io/RANDOM_SEEDS
162 2. Boot Loader Specification
164 https://systemd.io/BOOT_LOADER_SPECIFICATION
165 3. Boot Loader Interface
167 https://systemd.io/BOOT_LOADER_INTERFACE
168systemd 246 BOOTCTL(1)