параметры командной строки ядра (Kernel command line parameters)
CORE OS COMMAND LINE ARGUMENTS
systemd.unit=, rd.systemd.unit=, systemd.dump_core,
systemd.early_core_pattern=, systemd.crash_chvt,
systemd.crash_shell, systemd.crash_reboot, systemd.confirm_spawn,
systemd.service_watchdogs, systemd.show_status,
systemd.status_unit_format=, systemd.log_target=,
systemd.log_level=, systemd.log_location=, systemd.log_color,
systemd.default_standard_output=,
systemd.default_standard_error=, systemd.setenv=,
systemd.machine_id=, systemd.unified_cgroup_hierarchy,
systemd.legacy_systemd_cgroup_controller
Parameters understood by the system and service manager to
control system behavior. For details, see systemd(1).
systemd.mask=, systemd.wants=, systemd.debug_shell
Additional parameters understood by
systemd-debug-generator(8), to mask or start specific units
at boot, or invoke a debug shell on tty9.
systemd.run=, systemd.run_success_action=,
systemd.run_failure_action=
Additional parameters understood by systemd-run-generator(8),
to run a command line specified on the kernel command line as
system service after booting up.
systemd.early_core_pattern=
During early boot, the generation of core dump files is
disabled until a core dump handler (if any) takes over. This
parameter allows specifying an absolute path where core dump
files should be stored until a handler is installed. The path
should be absolute and may contain specifiers, see core(5)
for details.
systemd.restore_state=
This parameter is understood by several system tools to
control whether or not they should restore system state from
the previous boot. For details, see
systemd-backlight@.service(8) and systemd-rfkill.service(8).
systemd.volatile=
This parameter controls whether the system shall boot up in
volatile mode. Takes a boolean argument, or the special value
"state". If false (the default), normal boot mode is
selected, the root directory and /var/ are mounted as
specified on the kernel command line or /etc/fstab, or
otherwise configured. If true, full state-less boot mode is
selected. In this case the root directory is mounted as
volatile memory file system ("tmpfs"), and only /usr/ is
mounted from the file system configured as root device, in
read-only mode. This enables fully state-less boots were the
vendor-supplied OS is used as shipped, with only default
configuration and no stored state in effect, as /etc/ and
/var/ (as well as all other resources shipped in the root
file system) are reset at boot and lost on shutdown. If this
setting is set to "state" the root file system is mounted
read-only, however /var/ is mounted as a volatile memory file
system ("tmpfs"), so that the system boots up with the normal
configuration applied, but all state reset at boot and lost
at shutdown. If this setting is set to "overlay" the root
file system is set up as "overlayfs" mount combining the
read-only root directory with a writable "tmpfs", so that no
modifications are made to disk, but the file system may be
modified nonetheless with all changes being lost at reboot.
For details, see systemd-volatile-root.service(8) and
systemd-fstab-generator(8).
quiet
Parameter understood by both the kernel and the system and
service manager to control console log verbosity. For
details, see systemd(1).
debug
Parameter understood by both the kernel and the system and
service manager to control console log verbosity. For
details, see systemd(1).
-b, rd.emergency, emergency, rd.rescue, rescue, single, s, S, 1,
2, 3, 4, 5
Parameters understood by the system and service manager, as
compatibility and convenience options. For details, see
systemd(1).
locale.LANG=, locale.LANGUAGE=, locale.LC_CTYPE=,
locale.LC_NUMERIC=, locale.LC_TIME=, locale.LC_COLLATE=,
locale.LC_MONETARY=, locale.LC_MESSAGES=, locale.LC_PAPER=,
locale.LC_NAME=, locale.LC_ADDRESS=, locale.LC_TELEPHONE=,
locale.LC_MEASUREMENT=, locale.LC_IDENTIFICATION=
Parameters understood by the system and service manager to
control locale and language settings. For details, see
systemd(1).
fsck.mode=, fsck.repair=
Parameters understood by the file system checker services.
For details, see systemd-fsck@.service(8).
quotacheck.mode=
Parameter understood by the file quota checker service. For
details, see systemd-quotacheck.service(8).
systemd.journald.forward_to_syslog=,
systemd.journald.forward_to_kmsg=,
systemd.journald.forward_to_console=,
systemd.journald.forward_to_wall=
Parameters understood by the journal service. For details,
see systemd-journald.service(8).
vconsole.keymap=, vconsole.keymap_toggle=, vconsole.font=,
vconsole.font_map=, vconsole.font_unimap=
Parameters understood by the virtual console setup logic. For
details, see vconsole.conf(5).
udev.log_level=, rd.udev.log_level=, udev.children_max=,
rd.udev.children_max=, udev.exec_delay=, rd.udev.exec_delay=,
udev.event_timeout=, rd.udev.event_timeout=,
udev.timeout_signal=, rd.udev.timeout_signal=,
udev.blockdev_read_only, rd.udev.blockdev_read_only,
net.ifnames=, net.naming-scheme=
Parameters understood by the device event managing daemon.
For details, see systemd-udevd.service(8).
plymouth.enable=
May be used to disable the Plymouth boot splash. For details,
see plymouth(8).
luks=, rd.luks=, luks.crypttab=, rd.luks.crypttab=, luks.name=,
rd.luks.name=, luks.uuid=, rd.luks.uuid=, luks.options=,
rd.luks.options=, luks.key=, rd.luks.key=
Configures the LUKS full-disk encryption logic at boot. For
details, see systemd-cryptsetup-generator(8).
fstab=, rd.fstab=
Configures the /etc/fstab logic at boot. For details, see
systemd-fstab-generator(8).
root=, rootfstype=, rootflags=, ro, rw
Configures the root file system and its file system type and
mount options, as well as whether it shall be mounted
read-only or read-write initially. For details, see
systemd-fstab-generator(8).
mount.usr=, mount.usrfstype=, mount.usrflags=
Configures the /usr file system (if required) and its file
system type and mount options. For details, see
systemd-fstab-generator(8).
veritytab=, rd.veritytab=, roothash=, systemd.verity=,
rd.systemd.verity=, systemd.verity_root_data=,
systemd.verity_root_hash=, systemd.verity.root_options=
Configures the integrity protection root hash for the root
file system, and other related parameters. For details, see
systemd-veritysetup-generator(8).
systemd.gpt_auto=, rd.systemd.gpt_auto=
Configures whether GPT based partition auto-discovery shall
be attempted. For details, see systemd-gpt-auto-generator(8).
systemd.default_timeout_start_sec=
Overwrites the default start job timeout
DefaultTimeoutStartSec= at boot. For details, see
systemd-system.conf(5).
systemd.watchdog_device=
Overwrites the watchdog device path WatchdogDevice=. For
details, see systemd-system.conf(5).
systemd.cpu_affinity=
Overrides the CPU affinity mask for the service manager and
the default for all child processes it forks. This takes
precedence over CPUAffinity=, see systemd-system.conf(5) for
details.
modules_load=, rd.modules_load=
Load a specific kernel module early at boot. For details, see
systemd-modules-load.service(8).
resume=, resumeflags=
Enables resume from hibernation using the specified device
and mount options. All fstab(5)-like paths are supported. For
details, see systemd-hibernate-resume-generator(8).
systemd.firstboot=
Takes a boolean argument, defaults to on. If off,
systemd-firstboot.service(8) will not query the user for
basic system settings, even if the system boots up for the
first time and the relevant settings are not initialized yet.
Not to be confused with systemd.condition-first-boot= (see
below), which overrides the result of the ConditionFirstBoot=
unit file condition, and thus controls more than just
systemd-firstboot.service behaviour.
systemd.condition-needs-update=
Takes a boolean argument. If specified, overrides the result
of ConditionNeedsUpdate= unit condition checks. See
systemd.unit(5) for details.
systemd.condition-first-boot=
Takes a boolean argument. If specified, overrides the result
of ConditionFirstBoot= unit condition checks. See
systemd.unit(5) for details. Not to be confused with
systemd.firstboot= which only controls behaviour of the
systemd-firstboot.service system service but has no effect on
the condition check (see above).
systemd.clock-usec=
Takes a decimal, numeric timestamp in µs since January 1st
1970, 00:00am, to set the system clock to. The system time is
set to the specified timestamp early during boot. It is not
propagated to the hardware clock (RTC).
systemd.random-seed=
Takes a base64 encoded random seed value to credit with full
entropy to the kernel's random pool during early service
manager initialization. This option is useful in testing
environments where delays due to random pool initialization
in entropy starved virtual machines shall be avoided.
Note that if this option is used the seed is accessible to
unprivileged programs from /proc/cmdline. This option is
hence a security risk when used outside of test systems,
since the (possibly) only seed used for initialization of the
kernel's entropy pool might be easily acquired by
unprivileged programs.
It is recommended to pass 512 bytes of randomized data (as
that matches the Linux kernel pool size), which may be
generated with a command like the following:
dd if=/dev/urandom bs=512 count=1 status=none | base64 -w 0
Again: do not use this option outside of testing
environments, it's a security risk elsewhere, as secret key
material derived from the entropy pool can possibly be
reconstructed by unprivileged programs.
systemd.hostname=
Accepts a hostname to set during early boot. If specified
takes precedence over what is set in /etc/hostname. Note that
this does not bar later runtime changes to the hostname, it
simply controls the initial hostname set during early boot.
