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
  26         <refentryinfo>
  27                 <title>hostnamectl</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>hostnamectl</refentrytitle>
  42                 <manvolnum>1</manvolnum>
  43         </refmeta>
  44
  45         <refnamediv>
  46                 <refname>hostnamectl</refname>
  47                 <refpurpose>Control the system hostname</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <cmdsynopsis>
  52                         <command>hostnamectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
  53                 </cmdsynopsis>
  54         </refsynopsisdiv>
  55
  56         <refsect1>
  57                 <title>Description</title>
  58
  59                 <para><command>hostnamectl</command> may be used to
  60                 query and change the system hostname and related
  61                 settings.</para>
  62
  63                 <para>This tool distinguishes three different
  64                 hostnames: the high-level "pretty" hostname which
  65                 might include all kinds of special characters
  66                 (e.g. "Lennart's Laptop"), the static hostname which
  67                 is used to initialize the kernel hostname at boot
  68                 (e.g. "lennarts-laptop"), and the transient hostname
  69                 which might be assigned temporarily due to network
  70                 configuration and might revert back to the static
  71                 hostname if network connectivity is lost and is only
  72                 temporarily written to the kernel hostname
  73                 (e.g. "dhcp-47-11").</para>
  74
  75                 <para>Note that the pretty hostname has little
  76                 restrictions on the characters used, while the static
  77                 and transient hostnames are limited to the usually
  78                 accepted characters of internet domain names.</para>
  79
  80                 <para>The static hostname is stored in
  81                 <filename>/etc/hostname</filename>, see
  82                 <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  83                 for more information. The pretty hostname, chassis
  84                 type and icon name are stored in
  85                 <filename>/etc/machine-info</filename>, see
  86                 <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
  87         </refsect1>
  88
  89         <refsect1>
  90                 <title>Options</title>
  91
  92                 <para>The following options are understood:</para>
  93
  94                 <variablelist>
  95                         <varlistentry>
  96                                 <term><option>-h</option></term>
  97                                 <term><option>--help</option></term>
  98
  99                                 <listitem><para>Prints a short help
 100                                 text and exits.</para></listitem>
 101                         </varlistentry>
 102
 103                         <varlistentry>
 104                                 <term><option>--version</option></term>
 105
 106                                 <listitem><para>Prints a short version
 107                                 string and exits.</para></listitem>
 108                         </varlistentry>
 109
 110                         <varlistentry>
 111                                 <term><option>--no-ask-password</option></term>
 112
 113                                 <listitem><para>Don't query the user
 114                                 for authentication for privileged
 115                                 operations.</para></listitem>
 116                         </varlistentry>
 117
 118                         <varlistentry>
 119                                 <term><option>-P</option></term>
 120                                 <term><option>--privileged</option></term>
 121
 122                                 <listitem><para>Acquire privileges via PolicyKit
 123                                 before executing the operation.</para></listitem>
 124                         </varlistentry>
 125
 126                         <varlistentry>
 127                                 <term><option>-H</option></term>
 128                                 <term><option>--host</option></term>
 129
 130                                 <listitem><para>Execute the operation
 131                                 remotely. Specify a hostname, or
 132                                 username and hostname separated by @,
 133                                 to connect to. This will use SSH to
 134                                 talk to a remote
 135                                 system.</para></listitem>
 136                         </varlistentry>
 137
 138                         <varlistentry>
 139                                 <term><option>--static</option></term>
 140                                 <term><option>--transient</option></term>
 141                                 <term><option>--pretty</option></term>
 142
 143                                 <listitem><para>If
 144                                 <command>set-hostname</command> is
 145                                 invoked and one or more of these
 146                                 options are passed, only the selected
 147                                 hostname(s) is/are
 148                                 updated.</para></listitem>
 149                         </varlistentry>
 150                 </variablelist>
 151
 152                 <para>The following commands are understood:</para>
 153
 154                 <variablelist>
 155                         <varlistentry>
 156                                 <term><command>status</command></term>
 157
 158                                 <listitem><para>Show current system
 159                                 hostname and related
 160                                 information.</para></listitem>
 161                         </varlistentry>
 162
 163                         <varlistentry>
 164                                 <term><command>set-hostname [NAME]</command></term>
 165
 166                                 <listitem><para>Set the system
 167                                 hostname. By default, this will alter
 168                                 the pretty, the static, and the
 169                                 transient hostname alike; however, if
 170                                 one or more of
 171                                 <option>--static</option>,
 172                                 <option>--transient</option>,
 173                                 <option>--pretty</option> are used,
 174                                 only the selected hostnames are
 175                                 changed. If the pretty hostname is
 176                                 being set, and static or transient are
 177                                 being set as well, the specified
 178                                 hostname will be simplified in regards
 179                                 to the character set used before the
 180                                 latter are updated. This is done by
 181                                 replacing spaces with "-" and removing
 182                                 special characters. This ensures that
 183                                 the pretty and the static hostname are
 184                                 always closely related while still
 185                                 following the validity rules of the
 186                                 specific name. This simplification of
 187                                 the hostname string is not done if
 188                                 only the transient and/or static
 189                                 hostnames are set, and the pretty
 190                                 hostname is left untouched. Pass the
 191                                 empty string "" as the hostname to
 192                                 reset the selected hostnames to their
 193                                 default (usually "localhost").
 194                                 </para></listitem>
 195                         </varlistentry>
 196
 197                         <varlistentry>
 198                                 <term><command>set-icon-name [NAME]</command></term>
 199
 200                                 <listitem><para>Set the system icon
 201                                 name. The icon name is used by some
 202                                 graphical applications to visualize
 203                                 this host. The icon name should follow
 204                                 the <ulink
 205                                 url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
 206                                 Naming Specification</ulink>. Pass an
 207                                 empty string to this operation to
 208                                 reset the icon name to the default
 209                                 value, which is determined from chassis
 210                                 type (see below) and possibly other
 211                                 parameters.</para></listitem>
 212                         </varlistentry>
 213
 214                         <varlistentry>
 215                                 <term><command>set-chassis [TYPE]</command></term>
 216
 217                                 <listitem><para>Set the chassis
 218                                 type. The chassis type is used by some
 219                                 graphical applications to visualize
 220                                 the host or alter user
 221                                 interaction. Currently, the following
 222                                 chassis types are defined:
 223                                 <literal>desktop</literal>,
 224                                 <literal>laptop</literal>,
 225                                 <literal>server</literal>,
 226                                 <literal>tablet</literal>,
 227                                 <literal>handset</literal>, as well as
 228                                 the special chassis types
 229                                 <literal>vm</literal> and
 230                                 <literal>container</literal> for
 231                                 virtualized systems that lack an
 232                                 immediate physical chassis. Pass an
 233                                 empty string to this operation to
 234                                 reset the chassis type to the default
 235                                 value which is determined from the
 236                                 firmware and possibly other
 237                                 parameters.</para></listitem>
 238                         </varlistentry>
 239
 240                 </variablelist>
 241         </refsect1>
 242
 243         <refsect1>
 244                 <title>Exit status</title>
 245
 246                 <para>On success 0 is returned, a non-zero failure
 247                 code otherwise.</para>
 248         </refsect1>
 249
 250         <refsect1>
 251                 <title>See Also</title>
 252                 <para>
 253                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 254                         <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 255                         <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 256                         <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 257                         <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 258                         <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 259                 </para>
 260         </refsect1>
 261
 262 </refentry>