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