man/kernel-command-line.xml

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   8   Copyright 2012 Lennart Poettering
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  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>
  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
  62                 kernel please see <ulink
  63                 url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink>.</para>
  64
  65                 <para>For command line paramaters understood by the
  66                 initial RAM disk, please see
  67                 <citerefentry><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
  68                 or the documentation of the specific initrd
  69                 implementation of your installation.</para>
  70
  71         </refsect1>
  72
  73         <refsect1>
  74                 <title>Core OS Command Line Arguments</title>
  75
  76                 <variablelist>
  77                         <varlistentry>
  78                                 <term><varname>systemd.unit=</varname></term>
  79                                 <term><varname>rd.systemd.unit=</varname></term>
  80                                 <term><varname>systemd.dump_core=</varname></term>
  81                                 <term><varname>systemd.crash_shell=</varname></term>
  82                                 <term><varname>systemd.crash_chvt=</varname></term>
  83                                 <term><varname>systemd.confirm_spawn=</varname></term>
  84                                 <term><varname>systemd.show_status=</varname></term>
  85                                 <term><varname>systemd.log_target=</varname></term>
  86                                 <term><varname>systemd.log_level=</varname></term>
  87                                 <term><varname>systemd.log_color=</varname></term>
  88                                 <term><varname>systemd.log_location=</varname></term>
  89                                 <term><varname>systemd.default_standard_output=</varname></term>
  90                                 <term><varname>systemd.default_standard_error=</varname></term>
  91                                 <term><varname>systemd.setenv=</varname></term>
  92                                 <listitem>
  93                                         <para>Parameters understood by
  94                                         the system and service manager
  95                                         to control system behaviour. For details see
  96                                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
  97                                 </listitem>
  98                         </varlistentry>
  99
 100                         <varlistentry>
 101                                 <term><varname>quiet</varname></term>
 102                                 <listitem>
 103                                         <para>Parameter understood by
 104                                         both the kernel and the system
 105                                         and service manager to control
 106                                         console log verbosity. For
 107                                         details see
 108                                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
 109                                 </listitem>
 110                         </varlistentry>
 111
 112                         <varlistentry>
 113                                 <term><varname>emergency</varname></term>
 114                                 <term><varname>single</varname></term>
 115                                 <term><varname>s</varname></term>
 116                                 <term><varname>S</varname></term>
 117                                 <term><varname>1</varname></term>
 118                                 <term><varname>2</varname></term>
 119                                 <term><varname>3</varname></term>
 120                                 <term><varname>4</varname></term>
 121                                 <term><varname>5</varname></term>
 122                                 <listitem>
 123                                         <para>Parameters understood by
 124                                         the system and service
 125                                         manager, as compatibility
 126                                         options. For details see
 127                                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
 128                                 </listitem>
 129                         </varlistentry>
 130
 131                         <varlistentry>
 132                                 <term><varname>locale.LANG=</varname></term>
 133                                 <term><varname>locale.LANGUAGE=</varname></term>
 134                                 <term><varname>locale.LC_CTYPE=</varname></term>
 135                                 <term><varname>locale.LC_NUMERIC=</varname></term>
 136                                 <term><varname>locale.LC_TIME=</varname></term>
 137                                 <term><varname>locale.LC_COLLATE=</varname></term>
 138                                 <term><varname>locale.LC_MONETARY=</varname></term>
 139                                 <term><varname>locale.LC_MESSAGES=</varname></term>
 140                                 <term><varname>locale.LC_PAPER=</varname></term>
 141                                 <term><varname>locale.LC_NAME=</varname></term>
 142                                 <term><varname>locale.LC_ADDRESS=</varname></term>
 143                                 <term><varname>locale.LC_TELEPHONE=</varname></term>
 144                                 <term><varname>locale.LC_MEASUREMENT=</varname></term>
 145                                 <term><varname>locale.LC_IDENTIFICATION=</varname></term>
 146                                 <listitem>
 147                                         <para>Parameters understood by
 148                                         the system and service manager
 149                                         to control locale and language
 150                                         settings. For details see
 151                                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
 152                                 </listitem>
 153                         </varlistentry>
 154
 155                         <varlistentry>
 156                                 <term><varname>fsck.mode=</varname></term>
 157
 158                                 <listitem>
 159                                         <para>Parameter understood by
 160                                         the file system checker
 161                                         services. For details see
 162                                         <citerefentry><refentrytitle>fsck-root.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 163                                 </listitem>
 164                         </varlistentry>
 165
 166                         <varlistentry>
 167                                 <term><varname>quotacheck.mode=</varname></term>
 168
 169                                 <listitem>
 170                                         <para>Parameter understood by
 171                                         the file quota checker
 172                                         service. For details see
 173                                         <citerefentry><refentrytitle>quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 174                                 </listitem>
 175                         </varlistentry>
 176
 177                         <varlistentry>
 178                                 <term><varname>systemd.journald.forward_to_syslog=</varname></term>
 179                                 <term><varname>systemd.journald.forward_to_kmsg=</varname></term>
 180                                 <term><varname>systemd.journald.forward_to_console=</varname></term>
 181
 182                                 <listitem>
 183                                         <para>Parameters understood by
 184                                         the journal service. For
 185                                         details see
 186                                         <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 187                                 </listitem>
 188                         </varlistentry>
 189
 190                         <varlistentry>
 191                                 <term><varname>vconsole.keymap=</varname></term>
 192                                 <term><varname>vconsole.keymap.toggle=</varname></term>
 193                                 <term><varname>vconsole.font=</varname></term>
 194                                 <term><varname>vconsole.font.map=</varname></term>
 195                                 <term><varname>vconsole.font.unimap=</varname></term>
 196
 197                                 <listitem>
 198                                         <para>Parameters understood by
 199                                         the virtual console setup logic. For
 200                                         details see
 201                                         <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 202                                 </listitem>
 203                         </varlistentry>
 204
 205                         <varlistentry>
 206                                 <term><varname>udev.log-priority=</varname></term>
 207                                 <term><varname>rd.udev.log-priority=</varname></term>
 208                                 <term><varname>udev.children-max=</varname></term>
 209                                 <term><varname>rd.udev.children-max=</varname></term>
 210                                 <term><varname>udev.exec-delay=</varname></term>
 211                                 <term><varname>rd.udev.exec-delay=</varname></term>
 212
 213                                 <listitem>
 214                                         <para>Parameters understood by
 215                                         the device event managing daemon. For
 216                                         details see
 217                                         <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 218                                 </listitem>
 219                         </varlistentry>
 220
 221                         <varlistentry>
 222                                 <term><varname>plymouth.enable=</varname></term>
 223
 224                                 <listitem>
 225                                         <para>May be used to disable
 226                                         the Plymouth boot splash. For
 227                                         details see
 228                                         <citerefentry><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 229                                 </listitem>
 230                         </varlistentry>
 231
 232                         <varlistentry>
 233                                 <term><varname>luks=</varname></term>
 234                                 <term><varname>rd.luks=</varname></term>
 235                                 <term><varname>luks.crypttab=</varname></term>
 236                                 <term><varname>rd.luks.crypttab=</varname></term>
 237                                 <term><varname>luks.uuid=</varname></term>
 238                                 <term><varname>rd.luks.uuid=</varname></term>
 239
 240                                 <listitem>
 241                                         <para>Configures the LUKS
 242                                         full-disk encryption logic at
 243                                         boot. For details see
 244                                         <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 245                                 </listitem>
 246                         </varlistentry>
 247
 248                         <varlistentry>
 249                                 <term><varname>fstab=</varname></term>
 250                                 <term><varname>rd.fstab=</varname></term>
 251
 252                                 <listitem>
 253                                         <para>Configures the
 254                                         <filename>/etc/fstab</filename>
 255                                         logic at boot. For details see
 256                                         <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 257                                 </listitem>
 258                         </varlistentry>
 259
 260                         <varlistentry>
 261                                 <term><varname>driver=</varname></term>
 262                                 <term><varname>rd.driver=</varname></term>
 263
 264                                 <listitem>
 265                                         <para>Load a specific kernel
 266                                         boot early at boot. For
 267                                         details see
 268                                         <citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
 269                                 </listitem>
 270                         </varlistentry>
 271
 272                 </variablelist>
 273
 274         </refsect1>
 275
 276         <refsect1>
 277                   <title>See Also</title>
 278                   <para>
 279                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 280                           <citerefentry><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
 281                           <citerefentry><refentrytitle>fsck-root.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 282                           <citerefentry><refentrytitle>quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 283                           <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 284                           <citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 285                           <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 286                           <citerefentry><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 287                           <citerefentry><refentrytitle>cryptsetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 288                   </para>
 289         </refsect1>
 290
 291 </refentry>