projects / thirdparty / systemd.git / blame
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| c66e7bc7 LP |
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> |
| c66e7bc7 LP |
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 | |
| 409dee2e | 62 | kernel, please see <ulink |
| 99166f29 LP |
63 | url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink> |
| 64 | and | |
| 5aded369 | 65 | <citerefentry project='man-pages'><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 |
| 5aded369 | 69 | <citerefentry project='die-net'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
| 2a91f5f0 LP |
70 | or the documentation of the specific initrd |
| 71 | implementation of your installation.</para> | |
| c66e7bc7 LP |
72 | </refsect1> |
| 73 | ||
| 74 | <refsect1> | |
| 75 | <title>Core OS Command Line Arguments</title> | |
| 76 | ||
| ccc9a4f9 | 77 | <variablelist class='kernel-commandline-options'> |
| c66e7bc7 LP |
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> | |
| c66e7bc7 LP |
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 | |
| 409dee2e | 96 | to control system behavior. For details, see |
| c66e7bc7 LP |
97 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
| 98 | </listitem> | |
| 99 | </varlistentry> | |
| 100 | ||
| 52c611b7 LP |
101 | <varlistentry> |
| 102 | <term><varname>systemd.mask=</varname></term> | |
| 3c5a87a8 | 103 | <term><varname>systemd.wants=</varname></term> |
| 52c611b7 LP |
104 | <term><varname>systemd.debug-shell</varname></term> |
| 105 | <listitem> | |
| 106 | <para>Additional parameters | |
| 107 | understood by | |
| 108 | <citerefentry><refentrytitle>systemd-debug-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 3c5a87a8 LP |
109 | to mask or start specific |
| 110 | units at boot, or invoke a | |
| 111 | debug shell on tty9.</para> | |
| 52c611b7 LP |
112 | </listitem> |
| 113 | </varlistentry> | |
| 114 | ||
| 295edddf TG |
115 | <varlistentry> |
| 116 | <term><varname>systemd.restore_state=</varname></term> | |
| 117 | <listitem> | |
| 19aadacf | 118 | <para>This parameter is understood by |
| 295edddf TG |
119 | several system tools to control |
| 120 | whether or not they should restore | |
| 121 | system state from the previous boot. | |
| 122 | For details, see | |
| 123 | <citerefentry><refentrytitle>systemd-backlight@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
| 124 | and | |
| 125 | <citerefentry><refentrytitle>systemd-rfkill@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. | |
| 126 | </para> | |
| 127 | </listitem> | |
| 128 | </varlistentry> | |
| 129 | ||
| c66e7bc7 LP |
130 | <varlistentry> |
| 131 | <term><varname>quiet</varname></term> | |
| 132 | <listitem> | |
| ccb94c88 | 133 | <para>Parameter understood by |
| c66e7bc7 | 134 | both the kernel and the system |
| 9749cd77 LN |
135 | and service manager to control |
| 136 | console log verbosity. For | |
| 409dee2e | 137 | details, see |
| 9749cd77 LN |
138 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
| 139 | </listitem> | |
| 140 | </varlistentry> | |
| 141 | ||
| 142 | <varlistentry> | |
| 143 | <term><varname>debug</varname></term> | |
| 144 | <listitem> | |
| 145 | <para>Parameter understood by | |
| 146 | both the kernel and the system | |
| c66e7bc7 LP |
147 | and service manager to control |
| 148 | console log verbosity. For | |
| 409dee2e | 149 | details, see |
| c66e7bc7 LP |
150 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
| 151 | </listitem> | |
| 152 | </varlistentry> | |
| 153 | ||
| 154 | <varlistentry> | |
| 77565771 | 155 | <term><varname>-b</varname></term> |
| c66e7bc7 LP |
156 | <term><varname>emergency</varname></term> |
| 157 | <term><varname>single</varname></term> | |
| 158 | <term><varname>s</varname></term> | |
| 159 | <term><varname>S</varname></term> | |
| 160 | <term><varname>1</varname></term> | |
| 161 | <term><varname>2</varname></term> | |
| 162 | <term><varname>3</varname></term> | |
| 163 | <term><varname>4</varname></term> | |
| 164 | <term><varname>5</varname></term> | |
| 165 | <listitem> | |
| 166 | <para>Parameters understood by | |
| 167 | the system and service | |
| 168 | manager, as compatibility | |
| 409dee2e | 169 | options. For details, see |
| c66e7bc7 LP |
170 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
| 171 | </listitem> | |
| 172 | </varlistentry> | |
| 173 | ||
| 174 | <varlistentry> | |
| 175 | <term><varname>locale.LANG=</varname></term> | |
| 176 | <term><varname>locale.LANGUAGE=</varname></term> | |
| 177 | <term><varname>locale.LC_CTYPE=</varname></term> | |
| 178 | <term><varname>locale.LC_NUMERIC=</varname></term> | |
| 179 | <term><varname>locale.LC_TIME=</varname></term> | |
| 180 | <term><varname>locale.LC_COLLATE=</varname></term> | |
| 181 | <term><varname>locale.LC_MONETARY=</varname></term> | |
| 182 | <term><varname>locale.LC_MESSAGES=</varname></term> | |
| 183 | <term><varname>locale.LC_PAPER=</varname></term> | |
| 184 | <term><varname>locale.LC_NAME=</varname></term> | |
| 185 | <term><varname>locale.LC_ADDRESS=</varname></term> | |
| 186 | <term><varname>locale.LC_TELEPHONE=</varname></term> | |
| 187 | <term><varname>locale.LC_MEASUREMENT=</varname></term> | |
| 188 | <term><varname>locale.LC_IDENTIFICATION=</varname></term> | |
| 189 | <listitem> | |
| 190 | <para>Parameters understood by | |
| 191 | the system and service manager | |
| 192 | to control locale and language | |
| 409dee2e | 193 | settings. For details, see |
| c66e7bc7 LP |
194 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para> |
| 195 | </listitem> | |
| 196 | </varlistentry> | |
| 197 | ||
| 198 | <varlistentry> | |
| 199 | <term><varname>fsck.mode=</varname></term> | |
| f1f0198c HHPF |
200 | <term><varname>fsck.repair=</varname></term> |
| 201 | ||
| 202 | <listitem> | |
| 52c611b7 | 203 | <para>Parameters understood by |
| f1f0198c | 204 | the file system checker |
| 409dee2e | 205 | services. For details, see |
| a32f224a | 206 | <citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| c66e7bc7 LP |
207 | </listitem> |
| 208 | </varlistentry> | |
| 209 | ||
| 210 | <varlistentry> | |
| 211 | <term><varname>quotacheck.mode=</varname></term> | |
| 212 | ||
| 213 | <listitem> | |
| ccb94c88 | 214 | <para>Parameter understood by |
| c66e7bc7 | 215 | the file quota checker |
| 409dee2e | 216 | service. For details, see |
| 93a1d735 | 217 | <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| c66e7bc7 LP |
218 | </listitem> |
| 219 | </varlistentry> | |
| 220 | ||
| 221 | <varlistentry> | |
| 222 | <term><varname>systemd.journald.forward_to_syslog=</varname></term> | |
| 223 | <term><varname>systemd.journald.forward_to_kmsg=</varname></term> | |
| 224 | <term><varname>systemd.journald.forward_to_console=</varname></term> | |
| 40b71e89 | 225 | <term><varname>systemd.journald.forward_to_wall=</varname></term> |
| c66e7bc7 LP |
226 | |
| 227 | <listitem> | |
| 228 | <para>Parameters understood by | |
| 229 | the journal service. For | |
| 409dee2e | 230 | details, see |
| c66e7bc7 LP |
231 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 232 | </listitem> | |
| 233 | </varlistentry> | |
| 234 | ||
| 235 | <varlistentry> | |
| 236 | <term><varname>vconsole.keymap=</varname></term> | |
| 237 | <term><varname>vconsole.keymap.toggle=</varname></term> | |
| 238 | <term><varname>vconsole.font=</varname></term> | |
| 239 | <term><varname>vconsole.font.map=</varname></term> | |
| 240 | <term><varname>vconsole.font.unimap=</varname></term> | |
| 241 | ||
| 242 | <listitem> | |
| 243 | <para>Parameters understood by | |
| 244 | the virtual console setup logic. For | |
| 409dee2e | 245 | details, see |
| c66e7bc7 LP |
246 | <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 247 | </listitem> | |
| 248 | </varlistentry> | |
| 249 | ||
| 250 | <varlistentry> | |
| 251 | <term><varname>udev.log-priority=</varname></term> | |
| c66e7bc7 | 252 | <term><varname>rd.udev.log-priority=</varname></term> |
| 66a78c2b | 253 | <term><varname>udev.children-max=</varname></term> |
| c66e7bc7 | 254 | <term><varname>rd.udev.children-max=</varname></term> |
| 03658d4f LP |
255 | <term><varname>udev.exec-delay=</varname></term> |
| 256 | <term><varname>rd.udev.exec-delay=</varname></term> | |
| a057be1f | 257 | <term><varname>net.ifnames=</varname></term> |
| c66e7bc7 LP |
258 | |
| 259 | <listitem> | |
| 260 | <para>Parameters understood by | |
| 261 | the device event managing daemon. For | |
| 409dee2e | 262 | details, see |
| c7a5e7cf | 263 | <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| c66e7bc7 LP |
264 | </listitem> |
| 265 | </varlistentry> | |
| c66e7bc7 | 266 | |
| 66a78c2b LP |
267 | <varlistentry> |
| 268 | <term><varname>plymouth.enable=</varname></term> | |
| 269 | ||
| 270 | <listitem> | |
| 271 | <para>May be used to disable | |
| 272 | the Plymouth boot splash. For | |
| 409dee2e | 273 | details, see |
| 5aded369 | 274 | <citerefentry project='die-net'><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 66a78c2b LP |
275 | </listitem> |
| 276 | </varlistentry> | |
| 277 | ||
| 278 | <varlistentry> | |
| 279 | <term><varname>luks=</varname></term> | |
| 280 | <term><varname>rd.luks=</varname></term> | |
| 281 | <term><varname>luks.crypttab=</varname></term> | |
| 282 | <term><varname>rd.luks.crypttab=</varname></term> | |
| 283 | <term><varname>luks.uuid=</varname></term> | |
| 284 | <term><varname>rd.luks.uuid=</varname></term> | |
| ecd1e54c TG |
285 | <term><varname>luks.options=</varname></term> |
| 286 | <term><varname>rd.luks.options=</varname></term> | |
| 951657bd HH |
287 | <term><varname>luks.key=</varname></term> |
| 288 | <term><varname>rd.luks.key=</varname></term> | |
| 66a78c2b LP |
289 | |
| 290 | <listitem> | |
| 291 | <para>Configures the LUKS | |
| 292 | full-disk encryption logic at | |
| 409dee2e | 293 | boot. For details, see |
| 94734142 LP |
294 | <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 295 | </listitem> | |
| 296 | </varlistentry> | |
| 297 | ||
| 298 | <varlistentry> | |
| 299 | <term><varname>fstab=</varname></term> | |
| 300 | <term><varname>rd.fstab=</varname></term> | |
| 301 | ||
| 302 | <listitem> | |
| 303 | <para>Configures the | |
| 304 | <filename>/etc/fstab</filename> | |
| 409dee2e | 305 | logic at boot. For details, see |
| 94734142 | 306 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 66a78c2b LP |
307 | </listitem> |
| 308 | </varlistentry> | |
| 309 | ||
| 52c611b7 LP |
310 | <varlistentry> |
| 311 | <term><varname>root=</varname></term> | |
| 312 | <term><varname>rootfstype=</varname></term> | |
| 313 | <term><varname>rootfsflags=</varname></term> | |
| 314 | <term><varname>ro</varname></term> | |
| 315 | <term><varname>rw</varname></term> | |
| 316 | ||
| 317 | <listitem> | |
| 318 | <para>Configures the root file | |
| 319 | system and its file system | |
| 320 | type and mount options, as | |
| 321 | well as whether it shall be | |
| 322 | mounted read-only or | |
| 323 | read-writable initially. For | |
| 324 | details, see | |
| 325 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 326 | </listitem> | |
| 327 | </varlistentry> | |
| 328 | ||
| 329 | <varlistentry> | |
| 330 | <term><varname>systemd.gpt_auto=</varname></term> | |
| 331 | <term><varname>rd.systemd.gpt_auto=</varname></term> | |
| 332 | ||
| 333 | <listitem> | |
| 334 | <para>Configures whether GPT | |
| 335 | based partition auto-discovery | |
| 336 | shall be attempted. For | |
| 337 | details, see | |
| 338 | <citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
| 339 | </listitem> | |
| 340 | </varlistentry> | |
| 341 | ||
| 03658d4f | 342 | <varlistentry> |
| 627e4bb2 LP |
343 | <term><varname>modules-load=</varname></term> |
| 344 | <term><varname>rd.modules-load=</varname></term> | |
| 03658d4f LP |
345 | |
| 346 | <listitem> | |
| 347 | <para>Load a specific kernel | |
| 97f4e887 | 348 | module early at boot. For |
| 409dee2e | 349 | details, see |
| 03658d4f LP |
350 | <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 351 | </listitem> | |
| 352 | </varlistentry> | |
| 353 | ||
| d2c68822 IS |
354 | <varlistentry> |
| 355 | <term><varname>resume=</varname></term> | |
| 356 | ||
| 357 | <listitem> | |
| 358 | <para>Enables resume from hibernation | |
| 359 | using the specified device. | |
| 360 | All <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>-like | |
| 06b643e7 | 361 | paths are supported. For details, see |
| d2c68822 IS |
362 | <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
| 363 | </listitem> | |
| 364 | </varlistentry> | |
| 66a78c2b | 365 | </variablelist> |
| c66e7bc7 LP |
366 | |
| 367 | </refsect1> | |
| 368 | ||
| 369 | <refsect1> | |
| 370 | <title>See Also</title> | |
| 371 | <para> | |
| 372 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 5aded369 ZJS |
373 | <citerefentry project='man-pages'><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
| 374 | <citerefentry project='die-net'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
| 52c611b7 | 375 | <citerefentry><refentrytitle>systemd-debug-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| a32f224a | 376 | <citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 93a1d735 | 377 | <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| c66e7bc7 LP |
378 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 379 | <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| c7a5e7cf | 380 | <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 5aded369 | 381 | <citerefentry project='die-net'><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| eab367b9 LP |
382 | <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 383 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 52c611b7 LP |
384 | <citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 385 | <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| 386 | <citerefentry><refentrytitle>systemd-backlight@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
| d2c68822 IS |
387 | <citerefentry><refentrytitle>systemd-rfkill@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 388 | <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
| c66e7bc7 LP |
389 | </para> |
| 390 | </refsect1> | |
| 391 | ||
| 392 | </refentry> |