KERNEL-COMMAND-LINE(7) kernel-command-line KERNEL-COMMAND-LINE(7)
NAME
kernel-command-line - Kernel command line parameters
SYNOPSIS
/proc/cmdline
DESCRIPTION
The kernel, the initial RAM disk (initrd) and basic userspace functionality may be configured at boot via
kernel command line arguments.
For command line parameters understood by the kernel, please see kernel-parameters.txt[1] and bootparam(7).
For command line parameters understood by the initial RAM disk, please see dracut.cmdline(7), or the
documentation of the specific initrd implementation of your installation.
CORE OS COMMAND LINE ARGUMENTS
systemd.unit=, rd.systemd.unit=, systemd.dump_core=, systemd.crash_shell=, systemd.crash_chvt=,
systemd.confirm_spawn=, systemd.show_status=, systemd.log_target=, systemd.log_level=, systemd.log_color=,
systemd.log_location=, systemd.default_standard_output=, systemd.default_standard_error=, systemd.setenv=
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.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 [email protected](8) and systemd-
[email protected](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, emergency, rescue, single, s, S, 1, 2, 3, 4, 5
Parameters understood by the system and service manager, as compatibility 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 [email protected](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=,
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-writable initially. For details, see systemd-fstab-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).
modules-load=, rd.modules-load=
Load a specific kernel module early at boot. For details, see systemd-modules-load.service(8).
resume=
Enables resume from hibernation using the specified device. All fstab(5)-like paths are supported. For
details, see systemd-hibernate-resume-generator(8).
SEE ALSO
systemd(1), bootparam(7), dracut.cmdline(7), systemd-debug-generator(8), [email protected](8), systemd-
quotacheck.service(8), systemd-journald.service(8), systemd-vconsole-setup.service(8), systemd-
udevd.service(8), plymouth(8), systemd-cryptsetup-generator(8), systemd-fstab-generator(8), systemd-gpt-auto-
generator(8), systemd-modules-load.service(8), [email protected](8), [email protected](8),
systemd-hibernate-resume-generator(8)
NOTES
1. kernel-parameters.txt
https://www.kernel.org/doc/Documentation/kernel-parameters.txt
systemd 219 KERNEL-COMMAND-LINE(7)
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