1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
'\" t
.TH "KERNEL\-COMMAND\-LINE" "7" "" "systemd 215" "kernel-command-line"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
kernel-command-line \- Kernel command line parameters
.SH "SYNOPSIS"
.PP
/proc/cmdline
.SH "DESCRIPTION"
.PP
The kernel, the initial RAM disk (initrd) and basic userspace functionality may be configured at boot via kernel command line arguments\&.
.PP
For command line parameters understood by the kernel, please see
\m[blue]\fBkernel\-parameters\&.txt\fR\m[]\&\s-2\u[1]\d\s+2
and
\fBbootparam\fR(7)\&.
.PP
For command line parameters understood by the initial RAM disk, please see
\fBdracut.cmdline\fR(7), or the documentation of the specific initrd implementation of your installation\&.
.SH "CORE OS COMMAND LINE ARGUMENTS"
.PP
\fIsystemd\&.unit=\fR, \fIrd\&.systemd\&.unit=\fR, \fIsystemd\&.dump_core=\fR, \fIsystemd\&.crash_shell=\fR, \fIsystemd\&.crash_chvt=\fR, \fIsystemd\&.confirm_spawn=\fR, \fIsystemd\&.show_status=\fR, \fIsystemd\&.log_target=\fR, \fIsystemd\&.log_level=\fR, \fIsystemd\&.log_color=\fR, \fIsystemd\&.log_location=\fR, \fIsystemd\&.default_standard_output=\fR, \fIsystemd\&.default_standard_error=\fR, \fIsystemd\&.setenv=\fR
.RS 4
Parameters understood by the system and service manager to control system behavior\&. For details, see
\fBsystemd\fR(1)\&.
.RE
.PP
\fIsystemd\&.mask=\fR, \fIsystemd\&.wants=\fR, \fIsystemd\&.debug\-shell\fR
.RS 4
Additional parameters understood by
\fBsystemd-debug-generator\fR(8), to mask or start specific units at boot, or invoke a debug shell on tty9\&.
.RE
.PP
\fIsystemd\&.restore_state=\fR
.RS 4
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
\fBsystemd-backlight@.service\fR(8)
and
\fBsystemd-rfkill@.service\fR(8)\&.
.RE
.PP
\fIquiet\fR
.RS 4
Parameter understood by both the kernel and the system and service manager to control console log verbosity\&. For details, see
\fBsystemd\fR(1)\&.
.RE
.PP
\fIdebug\fR
.RS 4
Parameter understood by both the kernel and the system and service manager to control console log verbosity\&. For details, see
\fBsystemd\fR(1)\&.
.RE
.PP
\fI\-b\fR, \fIemergency\fR, \fIsingle\fR, \fIs\fR, \fIS\fR, \fI1\fR, \fI2\fR, \fI3\fR, \fI4\fR, \fI5\fR
.RS 4
Parameters understood by the system and service manager, as compatibility options\&. For details, see
\fBsystemd\fR(1)\&.
.RE
.PP
\fIlocale\&.LANG=\fR, \fIlocale\&.LANGUAGE=\fR, \fIlocale\&.LC_CTYPE=\fR, \fIlocale\&.LC_NUMERIC=\fR, \fIlocale\&.LC_TIME=\fR, \fIlocale\&.LC_COLLATE=\fR, \fIlocale\&.LC_MONETARY=\fR, \fIlocale\&.LC_MESSAGES=\fR, \fIlocale\&.LC_PAPER=\fR, \fIlocale\&.LC_NAME=\fR, \fIlocale\&.LC_ADDRESS=\fR, \fIlocale\&.LC_TELEPHONE=\fR, \fIlocale\&.LC_MEASUREMENT=\fR, \fIlocale\&.LC_IDENTIFICATION=\fR
.RS 4
Parameters understood by the system and service manager to control locale and language settings\&. For details, see
\fBsystemd\fR(1)\&.
.RE
.PP
\fIfsck\&.mode=\fR, \fIfsck\&.repair=\fR
.RS 4
Parameters understood by the file system checker services\&. For details, see
\fBsystemd-fsck@.service\fR(8)\&.
.RE
.PP
\fIquotacheck\&.mode=\fR
.RS 4
Parameter understood by the file quota checker service\&. For details, see
\fBsystemd-quotacheck.service\fR(8)\&.
.RE
.PP
\fIsystemd\&.journald\&.forward_to_syslog=\fR, \fIsystemd\&.journald\&.forward_to_kmsg=\fR, \fIsystemd\&.journald\&.forward_to_console=\fR, \fIsystemd\&.journald\&.forward_to_wall=\fR
.RS 4
Parameters understood by the journal service\&. For details, see
\fBsystemd-journald.service\fR(8)\&.
.RE
.PP
\fIvconsole\&.keymap=\fR, \fIvconsole\&.keymap\&.toggle=\fR, \fIvconsole\&.font=\fR, \fIvconsole\&.font\&.map=\fR, \fIvconsole\&.font\&.unimap=\fR
.RS 4
Parameters understood by the virtual console setup logic\&. For details, see
\fBsystemd-vconsole-setup.service\fR(8)\&.
.RE
.PP
\fIudev\&.log\-priority=\fR, \fIrd\&.udev\&.log\-priority=\fR, \fIudev\&.children\-max=\fR, \fIrd\&.udev\&.children\-max=\fR, \fIudev\&.exec\-delay=\fR, \fIrd\&.udev\&.exec\-delay=\fR, \fInet\&.ifnames=\fR
.RS 4
Parameters understood by the device event managing daemon\&. For details, see
\fBsystemd-udevd.service\fR(8)\&.
.RE
.PP
\fIplymouth\&.enable=\fR
.RS 4
May be used to disable the Plymouth boot splash\&. For details, see
\fBplymouth\fR(8)\&.
.RE
.PP
\fIluks=\fR, \fIrd\&.luks=\fR, \fIluks\&.crypttab=\fR, \fIrd\&.luks\&.crypttab=\fR, \fIluks\&.uuid=\fR, \fIrd\&.luks\&.uuid=\fR, \fIluks\&.options=\fR, \fIrd\&.luks\&.options=\fR, \fIluks\&.key=\fR, \fIrd\&.luks\&.key=\fR
.RS 4
Configures the LUKS full\-disk encryption logic at boot\&. For details, see
\fBsystemd-cryptsetup-generator\fR(8)\&.
.RE
.PP
\fIfstab=\fR, \fIrd\&.fstab=\fR
.RS 4
Configures the
/etc/fstab
logic at boot\&. For details, see
\fBsystemd-fstab-generator\fR(8)\&.
.RE
.PP
\fIroot=\fR, \fIrootfstype=\fR, \fIrootfsflags=\fR, \fIro\fR, \fIrw\fR
.RS 4
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
\fBsystemd-fstab-generator\fR(8)\&.
.RE
.PP
\fIsystemd\&.gpt_auto=\fR, \fIrd\&.systemd\&.gpt_auto=\fR
.RS 4
Configures whether GPT based partition auto\-discovery shall be attempted\&. For details, see
\fBsystemd-gpt-auto-generator\fR(8)\&.
.RE
.PP
\fImodules\-load=\fR, \fIrd\&.modules\-load=\fR
.RS 4
Load a specific kernel module early at boot\&. For details, see
\fBsystemd-modules-load.service\fR(8)\&.
.RE
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBbootparam\fR(7),
\fBdracut.cmdline\fR(7),
\fBsystemd-debug-generator\fR(8),
\fBsystemd-fsck@.service\fR(8),
\fBsystemd-quotacheck.service\fR(8),
\fBsystemd-journald.service\fR(8),
\fBsystemd-vconsole-setup.service\fR(8),
\fBsystemd-udevd.service\fR(8),
\fBplymouth\fR(8),
\fBsystemd-cryptsetup-generator\fR(8),
\fBsystemd-fstab-generator\fR(8),
\fBsystemd-gpt-auto-generator\fR(8),
\fBsystemd-modules-load.service\fR(8),
\fBsystemd-backlight@.service\fR(8),
\fBsystemd-rfkill@.service\fR(8)
.SH "NOTES"
.IP " 1." 4
kernel-parameters.txt
.RS 4
\%https://www.kernel.org/doc/Documentation/kernel-parameters.txt
.RE
|
