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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)
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