phpman > man > HOSTNAMECTL(1)

HOSTNAMECTL(1)                               hostnamectl                              HOSTNAMECTL(1)



NAME
       hostnamectl - Control the system hostname

SYNOPSIS
       hostnamectl [OPTIONS...] {COMMAND}

DESCRIPTION
       hostnamectl may be used to query and change the system hostname and related settings.

       systemd-hostnamed.service(8) and this tool distinguish three different hostnames: the
       high-level "pretty" hostname which might include all kinds of special characters (e.g.
       "Lennart's Laptop"), the "static" hostname which is the user-configured hostname (e.g.
       "lennarts-laptop"), and the transient hostname which is a fallback value received from
       network configuration (e.g. "node12345678"). If a static hostname is set to a valid value,
       then the transient hostname is not used.

       Note that the pretty hostname has little restrictions on the characters and length used,
       while the static and transient hostnames are limited to the usually accepted characters of
       Internet domain names, and 64 characters at maximum (the latter being a Linux limitation).

       Use systemd-firstboot(1) to initialize the system hostname for mounted (but not booted)
       system images.

COMMANDS
       The following commands are understood:

       status
           Show system hostname and related information. If no command is specified, this is the
           implied default.

       hostname [NAME]
           If no argument is given, print the system hostname. If an optional argument NAME is
           provided then the command changes the system hostname to NAME. By default, this will
           alter the pretty, the static, and the transient hostname alike; however, if one or more
           of --static, --transient, --pretty are used, only the selected hostnames are changed. If
           the pretty hostname is being set, and static or transient are being set as well, the
           specified hostname will be simplified in regards to the character set used before the
           latter are updated. This is done by removing special characters and spaces. This ensures
           that the pretty and the static hostname are always closely related while still following
           the validity rules of the specific name. This simplification of the hostname string is
           not done if only the transient and/or static hostnames are set, and the pretty hostname
           is left untouched.

           The static and transient hostnames must each be either a single DNS label (a string
           composed of 7-bit ASCII lower-case characters and no spaces or dots, limited to the
           format allowed for DNS domain name labels), or a sequence of such labels separated by
           single dots that forms a valid DNS FQDN. The hostname must be at most 64 characters,
           which is a Linux limitation (DNS allows longer names).

       icon-name [NAME]
           If no argument is given, print the icon name of the system. If an optional argument NAME
           is provided then the command changes the icon name to NAME. The icon name is used by some
           graphical applications to visualize this host. The icon name should follow the Icon
           Naming Specification[1].

       chassis [TYPE]
           If no argument is given, print the chassis type. If an optional argument TYPE is provided
           then the command changes the chassis type to TYPE. The chassis type is used by some
           graphical applications to visualize the host or alter user interaction. Currently, the
           following chassis types are defined: "desktop", "laptop", "convertible", "server",
           "tablet", "handset", "watch", "embedded", as well as the special chassis types "vm" and
           "container" for virtualized systems that lack an immediate physical chassis.

       deployment [ENVIRONMENT]
           If no argument is given, print the deployment environment. If an optional argument
           ENVIRONMENT is provided then the command changes the deployment environment to
           ENVIRONMENT. Argument ENVIRONMENT must be a single word without any control characters.
           One of the following is suggested: "development", "integration", "staging", "production".

       location [LOCATION]
           If no argument is given, print the location string for the system. If an optional
           argument LOCATION is provided then the command changes the location string for the system
           to LOCATION. Argument LOCATION should be a human-friendly, free-form string describing
           the physical location of the system, if it is known and applicable. This may be as
           generic as "Berlin, Germany" or as specific as "Left Rack, 2nd Shelf".

OPTIONS
       The following options are understood:

       --no-ask-password
           Do not query the user for authentication for privileged operations.

       --static, --transient, --pretty
           If status is invoked (or no explicit command is given) and one of these switches is
           specified, hostnamectl will print out just this selected hostname.

           If used with set-hostname, only the selected hostname(s) will be updated. When more than
           one of these switches are specified, all the specified hostnames will be updated.

       -H, --host=
           Execute the operation remotely. Specify a hostname, or a username and hostname separated
           by "@", to connect to. The hostname may optionally be suffixed by a port ssh is listening
           on, separated by ":", and then a container name, separated by "/", which connects
           directly to a specific container on the specified host. This will use SSH to talk to the
           remote machine manager instance. Container names may be enumerated with machinectl -H
           HOST. Put IPv6 addresses in brackets.

       -M, --machine=
           Execute operation on a local container. Specify a container name to connect to,
           optionally prefixed by a user name to connect as and a separating "@" character. If the
           special string ".host" is used in place of the container name, a connection to the local
           system is made (which is useful to connect to a specific user's user bus: "--user
           --machine=lennart@.host"). If the "@" syntax is not used, the connection is made as root
           user. If the "@" syntax is used either the left hand side or the right hand side may be
           omitted (but not both) in which case the local user name and ".host" are implied.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

       --json=MODE
           Shows output formatted as JSON. Expects one of "short" (for the shortest possible output
           without any redundant whitespace or line breaks), "pretty" (for a pretty version of the
           same, with indentation and line breaks) or "off" (to turn off JSON output, the default).

EXIT STATUS
       On success, 0 is returned, a non-zero failure code otherwise.

SEE ALSO
       systemd(1), hostname(1), hostname(5), machine-info(5), systemctl(1), systemd-
       hostnamed.service(8), systemd-firstboot(1)

NOTES
        1. Icon Naming Specification
           http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html



systemd 249                                                                           HOSTNAMECTL(1)