man/hostnamectl.xml

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   8   Copyright 2012 Lennart Poettering
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  23
  24 <refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'
  25           xmlns:xi="http://www.w3.org/2001/XInclude">
  26
  27         <refentryinfo>
  28                 <title>hostnamectl</title>
  29                 <productname>systemd</productname>
  30
  31                 <authorgroup>
  32                         <author>
  33                                 <contrib>Developer</contrib>
  34                                 <firstname>Lennart</firstname>
  35                                 <surname>Poettering</surname>
  36                                 <email>lennart@poettering.net</email>
  37                         </author>
  38                 </authorgroup>
  39         </refentryinfo>
  40
  41         <refmeta>
  42                 <refentrytitle>hostnamectl</refentrytitle>
  43                 <manvolnum>1</manvolnum>
  44         </refmeta>
  45
  46         <refnamediv>
  47                 <refname>hostnamectl</refname>
  48                 <refpurpose>Control the system hostname</refpurpose>
  49         </refnamediv>
  50
  51         <refsynopsisdiv>
  52                 <cmdsynopsis>
  53                         <command>hostnamectl</command>
  54                         <arg choice="opt" rep="repeat">OPTIONS</arg>
  55                         <arg choice="req">COMMAND</arg>
  56                 </cmdsynopsis>
  57         </refsynopsisdiv>
  58
  59         <refsect1>
  60                 <title>Description</title>
  61
  62                 <para><command>hostnamectl</command> may be used to
  63                 query and change the system hostname and related
  64                 settings.</para>
  65
  66                 <para>This tool distinguishes three different
  67                 hostnames: the high-level "pretty" hostname which
  68                 might include all kinds of special characters
  69                 (e.g. "Lennart's Laptop"), the static hostname which
  70                 is used to initialize the kernel hostname at boot
  71                 (e.g. "lennarts-laptop"), and the transient hostname
  72                 which is a default received from network configuration.
  73                 If a static hostname is set, and is valid (something other
  74                 than localhost), then the transient hostname is not used.</para>
  75
  76                 <para>Note that the pretty hostname has little
  77                 restrictions on the characters used, while the static
  78                 and transient hostnames are limited to the usually
  79                 accepted characters of Internet domain names.</para>
  80
  81                 <para>The static hostname is stored in
  82                 <filename>/etc/hostname</filename>, see
  83                 <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  84                 for more information. The pretty hostname, chassis
  85                 type, and icon name are stored in
  86                 <filename>/etc/machine-info</filename>, see
  87                 <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
  88
  89                 <para>Use
  90                 <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  91                 to initialize the system host name for mounted (but
  92                 not booted) system images.</para>
  93         </refsect1>
  94
  95         <refsect1>
  96                 <title>Options</title>
  97
  98                 <para>The following options are understood:</para>
  99
 100                 <variablelist>
 101                         <varlistentry>
 102                                 <term><option>--no-ask-password</option></term>
 103
 104                                 <listitem><para>Do not query the user
 105                                 for authentication for privileged
 106                                 operations.</para></listitem>
 107                         </varlistentry>
 108
 109                         <varlistentry>
 110                                 <term><option>--static</option></term>
 111                                 <term><option>--transient</option></term>
 112                                 <term><option>--pretty</option></term>
 113
 114                                 <listitem><para>If
 115                                 <command>status</command> is used (or
 116                                 no explicit command is given) and one
 117                                 of those fields is given,
 118                                 <command>hostnamectl</command> will
 119                                 print out just this selected
 120                                 hostname.</para>
 121
 122                                 <para>If used with
 123                                 <command>set-hostname</command>, only
 124                                 the selected hostname(s) will be
 125                                 updated. When more than one of those
 126                                 options is used, all the specified
 127                                 hostnames will be updated.
 128                                 </para></listitem>
 129                         </varlistentry>
 130
 131                         <xi:include href="user-system-options.xml" xpointer="host" />
 132
 133                         <xi:include href="standard-options.xml" xpointer="help" />
 134                         <xi:include href="standard-options.xml" xpointer="version" />
 135                 </variablelist>
 136
 137                 <para>The following commands are understood:</para>
 138
 139                 <variablelist>
 140                         <varlistentry>
 141                                 <term><command>status</command></term>
 142
 143                                 <listitem><para>Show current system
 144                                 hostname and related
 145                                 information.</para></listitem>
 146                         </varlistentry>
 147
 148                         <varlistentry>
 149                                 <term><command>set-hostname <replaceable>NAME</replaceable></command></term>
 150
 151                                 <listitem><para>Set the system
 152                                 hostname to
 153                                 <replaceable>NAME</replaceable>. By
 154                                 default, this will alter the pretty,
 155                                 the static, and the transient hostname
 156                                 alike; however, if one or more of
 157                                 <option>--static</option>,
 158                                 <option>--transient</option>,
 159                                 <option>--pretty</option> are used,
 160                                 only the selected hostnames are
 161                                 changed. If the pretty hostname is
 162                                 being set, and static or transient are
 163                                 being set as well, the specified
 164                                 hostname will be simplified in regards
 165                                 to the character set used before the
 166                                 latter are updated. This is done by
 167                                 replacing spaces with
 168                                 <literal>-</literal> and removing
 169                                 special characters. This ensures that
 170                                 the pretty and the static hostname are
 171                                 always closely related while still
 172                                 following the validity rules of the
 173                                 specific name. This simplification of
 174                                 the hostname string is not done if
 175                                 only the transient and/or static host
 176                                 names are set, and the pretty host
 177                                 name is left untouched.</para>
 178
 179                                 <para>Pass the empty string
 180                                 <literal></literal> as the hostname to
 181                                 reset the selected hostnames to their
 182                                 default (usually
 183                                 <literal>localhost</literal>).</para></listitem>
 184                         </varlistentry>
 185
 186                         <varlistentry>
 187                                 <term><command>set-icon-name <replaceable>NAME</replaceable></command></term>
 188
 189                                 <listitem><para>Set the system icon
 190                                 name to
 191                                 <replaceable>NAME</replaceable>. The
 192                                 icon name is used by some graphical
 193                                 applications to visualize this host.
 194                                 The icon name should follow the <ulink
 195                                 url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
 196                                 Naming Specification</ulink>.</para>
 197
 198                                 <para>Pass an empty string to reset
 199                                 the icon name to the default value,
 200                                 which is determined from chassis type
 201                                 (see below) and possibly other
 202                                 parameters.</para></listitem>
 203                         </varlistentry>
 204
 205                         <varlistentry>
 206                                 <term><command>set-chassis <replaceable>TYPE</replaceable></command></term>
 207
 208                                 <listitem><para>Set the chassis type
 209                                 to <replaceable>TYPE</replaceable>.
 210                                 The chassis type is used by some
 211                                 graphical applications to visualize
 212                                 the host or alter user interaction.
 213                                 Currently, the following chassis types
 214                                 are defined:
 215                                 <literal>desktop</literal>,
 216                                 <literal>laptop</literal>,
 217                                 <literal>server</literal>,
 218                                 <literal>tablet</literal>,
 219                                 <literal>handset</literal>,
 220                                 <literal>watch</literal>,
 221                                 <literal>embedded</literal> as well as
 222                                 the special chassis types
 223                                 <literal>vm</literal> and
 224                                 <literal>container</literal> for
 225                                 virtualized systems that lack an
 226                                 immediate physical chassis.</para>
 227
 228                                 <para>Pass an empty string to reset
 229                                 the chassis type to the default value
 230                                 which is determined from the firmware
 231                                 and possibly other parameters.</para>
 232                                 </listitem>
 233                         </varlistentry>
 234
 235                         <varlistentry>
 236                                 <term><command>set-deployment <replaceable>ENVIRONMENT</replaceable></command></term>
 237
 238                                 <listitem><para>Set the deployment
 239                                 environment
 240                                 description. <replaceable>ENVIRONMENT</replaceable>
 241                                 must be a single word without any
 242                                 control characters. One of the
 243                                 following is suggested:
 244                                 <literal>development</literal>,
 245                                 <literal>integration</literal>,
 246                                 <literal>staging</literal>,
 247                                 <literal>production</literal>.
 248                                 </para>
 249
 250                                 <para>Pass an empty string to reset to
 251                                 the default empty value.</para>
 252                                 </listitem>
 253                         </varlistentry>
 254
 255                         <varlistentry>
 256                                 <term><command>set-location <replaceable>LOCATION</replaceable></command></term>
 257
 258                                 <listitem><para>Set the location
 259                                 string for the system, if it is
 260                                 known. <replaceable>LOCATION</replaceable>
 261                                 should be a human-friendly, free-form
 262                                 string describing the physical
 263                                 location of the system, if it is known
 264                                 and applicable. This may be as generic
 265                                 as <literal>Berlin, Germany</literal>
 266                                 or as specific as <literal>Left Rack,
 267                                 2nd Shelf</literal>.</para>
 268
 269                                 <para>Pass an empty string to reset to
 270                                 the default empty value.</para>
 271                                 </listitem>
 272                         </varlistentry>
 273                 </variablelist>
 274         </refsect1>
 275
 276         <refsect1>
 277                 <title>Exit status</title>
 278
 279                 <para>On success, 0 is returned, a non-zero failure
 280                 code otherwise.</para>
 281         </refsect1>
 282
 283         <refsect1>
 284                 <title>See Also</title>
 285                 <para>
 286                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 287                         <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 288                         <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 289                         <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 290                         <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 291                         <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 292                         <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 293                 </para>
 294         </refsect1>
 295
 296 </refentry>