файл конфигурации локального имени хоста (Local hostname configuration file)
Имя (Name)
hostname - Local hostname configuration file
Синопсис (Synopsis)
/etc/hostname
Описание (Description)
The /etc/hostname file configures the name of the local system.
Unless overridden as described in the next section, systemd(1)
will set this hostname during boot using the sethostname(2)
system call.
The file should contain a single newline-terminated hostname
string. Comments (lines starting with a "#") are ignored. The
hostname should be composed of up to 64 7-bit ASCII lower-case
alphanumeric characters or hyphens forming a valid DNS domain
name. It is recommended that this name contains only a single
label, i.e. without any dots. Invalid characters will be filtered
out in an attempt to make the name valid, but obviously it is
recommended to use a valid name and not rely on this filtering.
You may use hostnamectl(1) to change the value of this file
during runtime from the command line. Use systemd-firstboot(1) to
initialize it on mounted (but not booted) system images.
HOSTNAME SEMANTICS
systemd(1) and the associated tools will obtain the hostname in
the following ways:
• If the kernel commandline parameter systemd.hostname=
specifies a valid hostname, systemd(1) will use it to set the
hostname during early boot, see kernel-command-line(7),
• Otherwise, the "static" hostname specified by /etc/hostname
as described above will be used.
• Otherwise, a transient hostname may be set during runtime,
for example based on information in a DHCP lease, see
systemd-hostnamed.service(8). Both NetworkManager
[1] and
systemd-networkd.service(8) allow this. Note that
systemd-hostnamed.service(8) gives higher priority to the
static hostname, so the transient hostname will only be used
if the static hostname is not configured.
• Otherwise, a fallback hostname configured at compilation time
will be used ("localhost").
Effectively, the static hostname has higher priority than a
transient hostname, which has higher priority than the fallback
hostname. Transient hostnames are equivalent, so setting a new
transient hostname causes the previous transient hostname to be
forgotten. The hostname specified on the kernel command line is
like a transient hostname, with the exception that it has higher
priority when the machine boots. Also note that those are the
semantics implemented by systemd tools, but other programs may
also set the hostname.
История (History)
The simple configuration file format of /etc/hostname originates
from Debian GNU/Linux.
Смотри также (See also)
systemd(1), sethostname(2), hostname(1), hostname(7),
machine-id(5), machine-info(5), hostnamectl(1),
systemd-hostnamed.service(8), systemd-firstboot(1)
Примечание (Note)
1. NetworkManager
https://developer.gnome.org/NetworkManager/stable/