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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
4 | ||
5 | <!-- | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2012 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | --> | |
23 | ||
24 | <refentry id="kernel-command-line"> | |
25 | ||
26 | <refentryinfo> | |
27 | <title>kernel-command-line</title> | |
28 | <productname>systemd</productname> | |
29 | ||
30 | <authorgroup> | |
31 | <author> | |
32 | <contrib>Developer</contrib> | |
33 | <firstname>Lennart</firstname> | |
34 | <surname>Poettering</surname> | |
35 | <email>lennart@poettering.net</email> | |
36 | </author> | |
37 | </authorgroup> | |
38 | </refentryinfo> | |
39 | ||
40 | <refmeta> | |
41 | <refentrytitle>kernel-command-line</refentrytitle> | |
42 | <manvolnum>7</manvolnum> | |
43 | </refmeta> | |
44 | ||
45 | <refnamediv> | |
46 | <refname>kernel-command-line</refname> | |
34511ca7 | 47 | <refpurpose>Kernel command line parameters</refpurpose> |
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48 | </refnamediv> |
49 | ||
50 | <refsynopsisdiv> | |
51 | <para><filename>/proc/cmdline</filename></para> | |
52 | </refsynopsisdiv> | |
53 | ||
54 | <refsect1> | |
55 | <title>Description</title> | |
56 | ||
57 | <para>The kernel, the initial RAM disk (initrd) and | |
58 | basic userspace functionality may be configured at boot via | |
59 | kernel command line arguments.</para> | |
60 | ||
61 | <para>For command line parameters understood by the | |
62 | kernel please see <ulink | |
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63 | url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink> |
64 | and | |
65 | <citerefentry><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para> | |
c66e7bc7 | 66 | |
2ab38e24 | 67 | <para>For command line parameters understood by the |
c66e7bc7 | 68 | initial RAM disk, please see |
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69 | <citerefentry><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
70 | or the documentation of the specific initrd | |
71 | implementation of your installation.</para> | |
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72 | </refsect1> |
73 | ||
74 | <refsect1> | |
75 | <title>Core OS Command Line Arguments</title> | |
76 | ||
ccc9a4f9 | 77 | <variablelist class='kernel-commandline-options'> |
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78 | <varlistentry> |
79 | <term><varname>systemd.unit=</varname></term> | |
80 | <term><varname>rd.systemd.unit=</varname></term> | |
81 | <term><varname>systemd.dump_core=</varname></term> | |
82 | <term><varname>systemd.crash_shell=</varname></term> | |
83 | <term><varname>systemd.crash_chvt=</varname></term> | |
84 | <term><varname>systemd.confirm_spawn=</varname></term> | |
85 | <term><varname>systemd.show_status=</varname></term> | |
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86 | <term><varname>systemd.log_target=</varname></term> |
87 | <term><varname>systemd.log_level=</varname></term> | |
88 | <term><varname>systemd.log_color=</varname></term> | |
89 | <term><varname>systemd.log_location=</varname></term> | |
90 | <term><varname>systemd.default_standard_output=</varname></term> | |
91 | <term><varname>systemd.default_standard_error=</varname></term> | |
92 | <term><varname>systemd.setenv=</varname></term> | |
93 | <listitem> | |
94 | <para>Parameters understood by | |
95 | the system and service manager | |
c5315881 | 96 | to control system behavior. For details see |
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97 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
98 | </listitem> | |
99 | </varlistentry> | |
100 | ||
101 | <varlistentry> | |
102 | <term><varname>quiet</varname></term> | |
103 | <listitem> | |
ccb94c88 | 104 | <para>Parameter understood by |
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105 | both the kernel and the system |
106 | and service manager to control | |
107 | console log verbosity. For | |
108 | details see | |
109 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
110 | </listitem> | |
111 | </varlistentry> | |
112 | ||
113 | <varlistentry> | |
114 | <term><varname>emergency</varname></term> | |
115 | <term><varname>single</varname></term> | |
116 | <term><varname>s</varname></term> | |
117 | <term><varname>S</varname></term> | |
118 | <term><varname>1</varname></term> | |
119 | <term><varname>2</varname></term> | |
120 | <term><varname>3</varname></term> | |
121 | <term><varname>4</varname></term> | |
122 | <term><varname>5</varname></term> | |
123 | <listitem> | |
124 | <para>Parameters understood by | |
125 | the system and service | |
126 | manager, as compatibility | |
127 | options. For details see | |
128 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
129 | </listitem> | |
130 | </varlistentry> | |
131 | ||
132 | <varlistentry> | |
133 | <term><varname>locale.LANG=</varname></term> | |
134 | <term><varname>locale.LANGUAGE=</varname></term> | |
135 | <term><varname>locale.LC_CTYPE=</varname></term> | |
136 | <term><varname>locale.LC_NUMERIC=</varname></term> | |
137 | <term><varname>locale.LC_TIME=</varname></term> | |
138 | <term><varname>locale.LC_COLLATE=</varname></term> | |
139 | <term><varname>locale.LC_MONETARY=</varname></term> | |
140 | <term><varname>locale.LC_MESSAGES=</varname></term> | |
141 | <term><varname>locale.LC_PAPER=</varname></term> | |
142 | <term><varname>locale.LC_NAME=</varname></term> | |
143 | <term><varname>locale.LC_ADDRESS=</varname></term> | |
144 | <term><varname>locale.LC_TELEPHONE=</varname></term> | |
145 | <term><varname>locale.LC_MEASUREMENT=</varname></term> | |
146 | <term><varname>locale.LC_IDENTIFICATION=</varname></term> | |
147 | <listitem> | |
148 | <para>Parameters understood by | |
149 | the system and service manager | |
150 | to control locale and language | |
151 | settings. For details see | |
152 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
153 | </listitem> | |
154 | </varlistentry> | |
155 | ||
156 | <varlistentry> | |
157 | <term><varname>fsck.mode=</varname></term> | |
158 | ||
159 | <listitem> | |
ccb94c88 | 160 | <para>Parameter understood by |
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161 | the file system checker |
162 | services. For details see | |
a32f224a | 163 | <citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
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164 | </listitem> |
165 | </varlistentry> | |
166 | ||
167 | <varlistentry> | |
168 | <term><varname>quotacheck.mode=</varname></term> | |
169 | ||
170 | <listitem> | |
ccb94c88 | 171 | <para>Parameter understood by |
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172 | the file quota checker |
173 | service. For details see | |
93a1d735 | 174 | <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
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175 | </listitem> |
176 | </varlistentry> | |
177 | ||
178 | <varlistentry> | |
179 | <term><varname>systemd.journald.forward_to_syslog=</varname></term> | |
180 | <term><varname>systemd.journald.forward_to_kmsg=</varname></term> | |
181 | <term><varname>systemd.journald.forward_to_console=</varname></term> | |
182 | ||
183 | <listitem> | |
184 | <para>Parameters understood by | |
185 | the journal service. For | |
186 | details see | |
187 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
188 | </listitem> | |
189 | </varlistentry> | |
190 | ||
191 | <varlistentry> | |
192 | <term><varname>vconsole.keymap=</varname></term> | |
193 | <term><varname>vconsole.keymap.toggle=</varname></term> | |
194 | <term><varname>vconsole.font=</varname></term> | |
195 | <term><varname>vconsole.font.map=</varname></term> | |
196 | <term><varname>vconsole.font.unimap=</varname></term> | |
197 | ||
198 | <listitem> | |
199 | <para>Parameters understood by | |
200 | the virtual console setup logic. For | |
201 | details see | |
202 | <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
203 | </listitem> | |
204 | </varlistentry> | |
205 | ||
206 | <varlistentry> | |
207 | <term><varname>udev.log-priority=</varname></term> | |
c66e7bc7 | 208 | <term><varname>rd.udev.log-priority=</varname></term> |
66a78c2b | 209 | <term><varname>udev.children-max=</varname></term> |
c66e7bc7 | 210 | <term><varname>rd.udev.children-max=</varname></term> |
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211 | <term><varname>udev.exec-delay=</varname></term> |
212 | <term><varname>rd.udev.exec-delay=</varname></term> | |
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213 | |
214 | <listitem> | |
215 | <para>Parameters understood by | |
216 | the device event managing daemon. For | |
217 | details see | |
c7a5e7cf | 218 | <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
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219 | </listitem> |
220 | </varlistentry> | |
c66e7bc7 | 221 | |
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222 | <varlistentry> |
223 | <term><varname>plymouth.enable=</varname></term> | |
224 | ||
225 | <listitem> | |
226 | <para>May be used to disable | |
227 | the Plymouth boot splash. For | |
228 | details see | |
229 | <citerefentry><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
230 | </listitem> | |
231 | </varlistentry> | |
232 | ||
233 | <varlistentry> | |
234 | <term><varname>luks=</varname></term> | |
235 | <term><varname>rd.luks=</varname></term> | |
236 | <term><varname>luks.crypttab=</varname></term> | |
237 | <term><varname>rd.luks.crypttab=</varname></term> | |
238 | <term><varname>luks.uuid=</varname></term> | |
239 | <term><varname>rd.luks.uuid=</varname></term> | |
240 | ||
241 | <listitem> | |
242 | <para>Configures the LUKS | |
243 | full-disk encryption logic at | |
244 | boot. For details see | |
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245 | <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
246 | </listitem> | |
247 | </varlistentry> | |
248 | ||
249 | <varlistentry> | |
250 | <term><varname>fstab=</varname></term> | |
251 | <term><varname>rd.fstab=</varname></term> | |
252 | ||
253 | <listitem> | |
254 | <para>Configures the | |
255 | <filename>/etc/fstab</filename> | |
256 | logic at boot. For details see | |
257 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
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258 | </listitem> |
259 | </varlistentry> | |
260 | ||
03658d4f | 261 | <varlistentry> |
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262 | <term><varname>modules-load=</varname></term> |
263 | <term><varname>rd.modules-load=</varname></term> | |
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264 | |
265 | <listitem> | |
266 | <para>Load a specific kernel | |
97f4e887 | 267 | module early at boot. For |
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268 | details see |
269 | <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
270 | </listitem> | |
271 | </varlistentry> | |
272 | ||
66a78c2b | 273 | </variablelist> |
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274 | |
275 | </refsect1> | |
276 | ||
277 | <refsect1> | |
278 | <title>See Also</title> | |
279 | <para> | |
280 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
eab367b9 | 281 | <citerefentry><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
c66e7bc7 | 282 | <citerefentry><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
a32f224a | 283 | <citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
93a1d735 | 284 | <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
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285 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
286 | <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
c7a5e7cf | 287 | <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
2488799b | 288 | <citerefentry><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
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289 | <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
290 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
291 | <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
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292 | </para> |
293 | </refsect1> | |
294 | ||
295 | </refentry> |