NAME
hostnamectl - Control the system hostnameSYNOPSIS
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: statusShow 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-passwordDo 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 hostnames 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=[email protected]"). 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
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