hostnamectl
(1)Control the system hostname
Options
8--static--transient--prettyIf 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 hostname, only the selected hostnames will be updated. When more than one of these switches are specified, all the specified hostnames will be updated. Added in version 195.
-H--hostExecute 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--machineExecute 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.
--no-ask-passwordDo not query the user for authentication for privileged operations.
-h--helpPrint a short help text and exit.
--versionPrint a short version string and exit.
--jsonMODEShows 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).
-jEquivalent to --json=pretty if running on a terminal, and --json=short otherwise.
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
Added in version 195.
hostname [NAME]
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).
Added in version 249.
icon-name [NAME]
Added in version 249.
chassis [TYPE]
Added in version 249.
deployment [ENVIRONMENT]
Added in version 249.
location [LOCATION]
Added in version 249.