hostnamectl - Control the system hostname
hostnamectl [OPTIONS...] {COMMAND}
hostnamectl may be used to query and change the system
hostname and related settings.
This tool distinguishes 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
used to initialize the kernel hostname at boot (e.g.
"lennarts-laptop"), and the transient hostname which is a fallback
value received from network configuration. If a static hostname is set, and
is valid (something other than localhost), 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).
The static hostname is stored in /etc/hostname, see
hostname(5) for more information. The pretty hostname, chassis type,
and icon name are stored in /etc/machine-info, see
machine-info(5).
Use systemd-firstboot(1) to initialize the system hostname
for mounted (but not booted) system images.
The following commands are understood:
status
Show current system hostname and related information. If
no command is specified, this is the implied default.
set-hostname NAME
Set 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.
Pass the empty string "" as the hostname to reset the
selected hostnames to their default (usually "localhost").
set-icon-name NAME
Set the system 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].
Pass an empty string to reset the icon name to the default value,
which is determined from chassis type (see below) and possibly other
parameters.
set-chassis TYPE
Set 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.
Pass an empty string to reset the chassis type to the default
value which is determined from the firmware and possibly other
parameters.
set-deployment ENVIRONMENT
Set the deployment environment description.
ENVIRONMENT must be a single word without any control characters. One
of the following is suggested: "development",
"integration", "staging", "production".
Pass an empty string to reset to the default empty value.
set-location LOCATION
Set the location string for the system, if it is known.
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".
Pass an empty string to reset to the default empty value.
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.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
On success, 0 is returned, a non-zero failure code otherwise.
- 1.
- Icon Naming Specification
http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html