projects / thirdparty / systemd.git / blame
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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
| 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
| 12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
| c66e7bc7 LP |
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 | ||
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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> | |
| 47 | <refpurpose>Kernel command line parameters</refpurpose> | |
| 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 kernel, please | |
| 62 | see <ulink | |
| 63 | url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink> | |
| 64 | and | |
| 65 | <citerefentry project='man-pages'><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para> | |
| 66 | ||
| 67 | <para>For command line parameters understood by the initial RAM | |
| 68 | disk, please see | |
| af105d03 | 69 | <citerefentry project='man-pages'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
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70 | or the documentation of the specific initrd implementation of your |
| 71 | installation.</para> | |
| 72 | </refsect1> | |
| 73 | ||
| 74 | <refsect1> | |
| 75 | <title>Core OS Command Line Arguments</title> | |
| 76 | ||
| 77 | <variablelist class='kernel-commandline-options'> | |
| 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> | |
| 798d3a52 | 82 | <term><varname>systemd.crash_chvt=</varname></term> |
| b9e74c39 LP |
83 | <term><varname>systemd.crash_shell=</varname></term> |
| 84 | <term><varname>systemd.crash_reboot=</varname></term> | |
| 798d3a52 ZJS |
85 | <term><varname>systemd.confirm_spawn=</varname></term> |
| 86 | <term><varname>systemd.show_status=</varname></term> | |
| 87 | <term><varname>systemd.log_target=</varname></term> | |
| 88 | <term><varname>systemd.log_level=</varname></term> | |
| 89 | <term><varname>systemd.log_color=</varname></term> | |
| 90 | <term><varname>systemd.log_location=</varname></term> | |
| 91 | <term><varname>systemd.default_standard_output=</varname></term> | |
| 92 | <term><varname>systemd.default_standard_error=</varname></term> | |
| 93 | <term><varname>systemd.setenv=</varname></term> | |
| ee48dbd5 | 94 | <term><varname>systemd.machine_id=</varname></term> |
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95 | <listitem> |
| 96 | <para>Parameters understood by the system and service | |
| 97 | manager to control system behavior. For details, see | |
| 98 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
| 99 | </listitem> | |
| 100 | </varlistentry> | |
| 101 | ||
| 102 | <varlistentry> | |
| 103 | <term><varname>systemd.mask=</varname></term> | |
| 104 | <term><varname>systemd.wants=</varname></term> | |
| 105 | <term><varname>systemd.debug-shell</varname></term> | |
| 106 | <listitem> | |
| 107 | <para>Additional parameters understood by | |
| 108 | <citerefentry><refentrytitle>systemd-debug-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 109 | to mask or start specific units at boot, or invoke a debug | |
| 110 | shell on tty9.</para> | |
| 111 | </listitem> | |
| 112 | </varlistentry> | |
| 113 | ||
| 114 | <varlistentry> | |
| 115 | <term><varname>systemd.restore_state=</varname></term> | |
| 116 | <listitem> | |
| 117 | <para>This parameter is understood by several system tools | |
| 118 | to control whether or not they should restore system state | |
| 119 | from the previous boot. For details, see | |
| 120 | <citerefentry><refentrytitle>systemd-backlight@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
| 121 | and | |
| af105d03 | 122 | <citerefentry><refentrytitle>systemd-rfkill.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. |
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123 | </para> |
| 124 | </listitem> | |
| 125 | </varlistentry> | |
| 126 | ||
| 127 | <varlistentry> | |
| 128 | <term><varname>quiet</varname></term> | |
| 129 | <listitem> | |
| 130 | <para>Parameter understood by both the kernel and the system | |
| 131 | and service manager to control console log verbosity. For | |
| 132 | details, see | |
| 133 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
| 134 | </listitem> | |
| 135 | </varlistentry> | |
| 136 | ||
| 137 | <varlistentry> | |
| 138 | <term><varname>debug</varname></term> | |
| 139 | <listitem> | |
| 140 | <para>Parameter understood by both the kernel and the system | |
| 141 | and service manager to control console log verbosity. For | |
| 142 | details, see | |
| 143 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
| 144 | </listitem> | |
| 145 | </varlistentry> | |
| 146 | ||
| 147 | <varlistentry> | |
| 148 | <term><varname>-b</varname></term> | |
| dcd61450 | 149 | <term><varname>rd.emergency</varname></term> |
| 798d3a52 | 150 | <term><varname>emergency</varname></term> |
| dcd61450 | 151 | <term><varname>rd.rescue</varname></term> |
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152 | <term><varname>rescue</varname></term> |
| 153 | <term><varname>single</varname></term> | |
| 154 | <term><varname>s</varname></term> | |
| 155 | <term><varname>S</varname></term> | |
| 156 | <term><varname>1</varname></term> | |
| 157 | <term><varname>2</varname></term> | |
| 158 | <term><varname>3</varname></term> | |
| 159 | <term><varname>4</varname></term> | |
| 160 | <term><varname>5</varname></term> | |
| 161 | <listitem> | |
| 162 | <para>Parameters understood by the system and service | |
| dcd61450 | 163 | manager, as compatibility and convenience options. For details, see |
| 798d3a52 ZJS |
164 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
| 165 | </listitem> | |
| 166 | </varlistentry> | |
| 167 | ||
| 168 | <varlistentry> | |
| 169 | <term><varname>locale.LANG=</varname></term> | |
| 170 | <term><varname>locale.LANGUAGE=</varname></term> | |
| 171 | <term><varname>locale.LC_CTYPE=</varname></term> | |
| 172 | <term><varname>locale.LC_NUMERIC=</varname></term> | |
| 173 | <term><varname>locale.LC_TIME=</varname></term> | |
| 174 | <term><varname>locale.LC_COLLATE=</varname></term> | |
| 175 | <term><varname>locale.LC_MONETARY=</varname></term> | |
| 176 | <term><varname>locale.LC_MESSAGES=</varname></term> | |
| 177 | <term><varname>locale.LC_PAPER=</varname></term> | |
| 178 | <term><varname>locale.LC_NAME=</varname></term> | |
| 179 | <term><varname>locale.LC_ADDRESS=</varname></term> | |
| 180 | <term><varname>locale.LC_TELEPHONE=</varname></term> | |
| 181 | <term><varname>locale.LC_MEASUREMENT=</varname></term> | |
| 182 | <term><varname>locale.LC_IDENTIFICATION=</varname></term> | |
| 183 | <listitem> | |
| 184 | <para>Parameters understood by the system and service | |
| 185 | manager to control locale and language settings. For | |
| 186 | details, see | |
| 187 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> | |
| 188 | </listitem> | |
| 189 | </varlistentry> | |
| 190 | ||
| 191 | <varlistentry> | |
| 192 | <term><varname>fsck.mode=</varname></term> | |
| 193 | <term><varname>fsck.repair=</varname></term> | |
| 194 | ||
| 195 | <listitem> | |
| 196 | <para>Parameters understood by the file system checker | |
| 197 | services. For details, see | |
| 198 | <citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 199 | </listitem> | |
| 200 | </varlistentry> | |
| 201 | ||
| 202 | <varlistentry> | |
| 203 | <term><varname>quotacheck.mode=</varname></term> | |
| 204 | ||
| 205 | <listitem> | |
| 206 | <para>Parameter understood by the file quota checker | |
| 207 | service. For details, see | |
| 208 | <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 209 | </listitem> | |
| 210 | </varlistentry> | |
| 211 | ||
| 212 | <varlistentry> | |
| 213 | <term><varname>systemd.journald.forward_to_syslog=</varname></term> | |
| 214 | <term><varname>systemd.journald.forward_to_kmsg=</varname></term> | |
| 215 | <term><varname>systemd.journald.forward_to_console=</varname></term> | |
| 216 | <term><varname>systemd.journald.forward_to_wall=</varname></term> | |
| 217 | ||
| 218 | <listitem> | |
| 219 | <para>Parameters understood by the journal service. For | |
| 220 | details, see | |
| 221 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 222 | </listitem> | |
| 223 | </varlistentry> | |
| 224 | ||
| 225 | <varlistentry> | |
| 226 | <term><varname>vconsole.keymap=</varname></term> | |
| 72ccee50 | 227 | <term><varname>vconsole.keymap_toggle=</varname></term> |
| 798d3a52 | 228 | <term><varname>vconsole.font=</varname></term> |
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229 | <term><varname>vconsole.font_map=</varname></term> |
| 230 | <term><varname>vconsole.font_unimap=</varname></term> | |
| 798d3a52 ZJS |
231 | |
| 232 | <listitem> | |
| 72ccee50 ZJS |
233 | <para>Parameters understood by the virtual console setup logic. For details, see |
| 234 | <citerefentry><refentrytitle>vconsole.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
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235 | </listitem> |
| 236 | </varlistentry> | |
| 237 | ||
| 238 | <varlistentry> | |
| 239 | <term><varname>udev.log-priority=</varname></term> | |
| 240 | <term><varname>rd.udev.log-priority=</varname></term> | |
| 241 | <term><varname>udev.children-max=</varname></term> | |
| 242 | <term><varname>rd.udev.children-max=</varname></term> | |
| 243 | <term><varname>udev.exec-delay=</varname></term> | |
| 244 | <term><varname>rd.udev.exec-delay=</varname></term> | |
| 245 | <term><varname>udev.event-timeout=</varname></term> | |
| 246 | <term><varname>rd.udev.event-timeout=</varname></term> | |
| 247 | <term><varname>net.ifnames=</varname></term> | |
| 248 | ||
| 249 | <listitem> | |
| 250 | <para>Parameters understood by the device event managing | |
| 251 | daemon. For details, see | |
| 252 | <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 253 | </listitem> | |
| 254 | </varlistentry> | |
| 255 | ||
| 256 | <varlistentry> | |
| 257 | <term><varname>plymouth.enable=</varname></term> | |
| 258 | ||
| 259 | <listitem> | |
| 260 | <para>May be used to disable the Plymouth boot splash. For | |
| 261 | details, see | |
| 262 | <citerefentry project='die-net'><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 263 | </listitem> | |
| 264 | </varlistentry> | |
| 265 | ||
| 266 | <varlistentry> | |
| 267 | <term><varname>luks=</varname></term> | |
| 268 | <term><varname>rd.luks=</varname></term> | |
| 269 | <term><varname>luks.crypttab=</varname></term> | |
| 270 | <term><varname>rd.luks.crypttab=</varname></term> | |
| 271 | <term><varname>luks.name=</varname></term> | |
| 272 | <term><varname>rd.luks.name=</varname></term> | |
| 273 | <term><varname>luks.uuid=</varname></term> | |
| 274 | <term><varname>rd.luks.uuid=</varname></term> | |
| 275 | <term><varname>luks.options=</varname></term> | |
| 276 | <term><varname>rd.luks.options=</varname></term> | |
| 277 | <term><varname>luks.key=</varname></term> | |
| 278 | <term><varname>rd.luks.key=</varname></term> | |
| 279 | ||
| 280 | <listitem> | |
| 281 | <para>Configures the LUKS full-disk encryption logic at | |
| 282 | boot. For details, see | |
| 283 | <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 284 | </listitem> | |
| 285 | </varlistentry> | |
| 286 | ||
| 287 | <varlistentry> | |
| 288 | <term><varname>fstab=</varname></term> | |
| 289 | <term><varname>rd.fstab=</varname></term> | |
| 290 | ||
| 291 | <listitem> | |
| 292 | <para>Configures the <filename>/etc/fstab</filename> logic | |
| 293 | at boot. For details, see | |
| 294 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 295 | </listitem> | |
| 296 | </varlistentry> | |
| 297 | ||
| 298 | <varlistentry> | |
| 299 | <term><varname>root=</varname></term> | |
| 300 | <term><varname>rootfstype=</varname></term> | |
| d6a12e7c | 301 | <term><varname>rootflags=</varname></term> |
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302 | <term><varname>ro</varname></term> |
| 303 | <term><varname>rw</varname></term> | |
| 304 | ||
| 305 | <listitem> | |
| 306 | <para>Configures the root file system and its file system | |
| 307 | type and mount options, as well as whether it shall be | |
| 308 | mounted read-only or read-writable initially. For details, | |
| 309 | see | |
| 310 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 311 | </listitem> | |
| 312 | </varlistentry> | |
| 313 | ||
| 314 | <varlistentry> | |
| 315 | <term><varname>systemd.gpt_auto=</varname></term> | |
| 316 | <term><varname>rd.systemd.gpt_auto=</varname></term> | |
| 317 | ||
| 318 | <listitem> | |
| 319 | <para>Configures whether GPT based partition auto-discovery | |
| 320 | shall be attempted. For details, see | |
| 321 | <citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 322 | </listitem> | |
| 323 | </varlistentry> | |
| 324 | ||
| 959718c6 TB |
325 | <varlistentry> |
| 326 | <term><varname>systemd.default_timeout_start_sec=</varname></term> | |
| 327 | ||
| 328 | <listitem> | |
| 329 | <para>Overwrites the default start job timeout <varname>DefaultTimeoutStartSec=</varname> at boot. For details, | |
| 330 | see <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
| 331 | </listitem> | |
| 332 | </varlistentry> | |
| 333 | ||
| 798d3a52 ZJS |
334 | <varlistentry> |
| 335 | <term><varname>modules-load=</varname></term> | |
| 336 | <term><varname>rd.modules-load=</varname></term> | |
| 337 | ||
| 338 | <listitem> | |
| 339 | <para>Load a specific kernel module early at boot. For | |
| 340 | details, see | |
| 341 | <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 342 | </listitem> | |
| 343 | </varlistentry> | |
| 344 | ||
| 345 | <varlistentry> | |
| 346 | <term><varname>resume=</varname></term> | |
| 347 | ||
| 348 | <listitem> | |
| 349 | <para>Enables resume from hibernation using the specified | |
| 350 | device. All | |
| 3ba3a79d | 351 | <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>-like |
| 798d3a52 ZJS |
352 | paths are supported. For details, see |
| 353 | <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 354 | </listitem> | |
| 355 | </varlistentry> | |
| 356 | </variablelist> | |
| 357 | ||
| 358 | </refsect1> | |
| 359 | ||
| 360 | <refsect1> | |
| 361 | <title>See Also</title> | |
| 362 | <para> | |
| 363 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 364 | <citerefentry project='man-pages'><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
| af105d03 | 365 | <citerefentry project='man-pages'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
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366 | <citerefentry><refentrytitle>systemd-debug-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 367 | <citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 368 | <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 369 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 370 | <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 371 | <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 372 | <citerefentry project='die-net'><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 373 | <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 374 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 375 | <citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 376 | <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 377 | <citerefentry><refentrytitle>systemd-backlight@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| af105d03 | 378 | <citerefentry><refentrytitle>systemd-rfkill.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 798d3a52 ZJS |
379 | <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> |
| 380 | </para> | |
| 381 | </refsect1> | |
| c66e7bc7 LP |
382 | |
| 383 | </refentry> |