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'\" t
.TH "HOSTNAME" "5" "" "systemd 241" "hostname"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
hostname \- Local hostname configuration file
.SH "SYNOPSIS"
.PP
/etc/hostname
.SH "DESCRIPTION"
.PP
The
/etc/hostname
file configures the name of the local system that is set during boot using the
\fBsethostname\fR(2)
system call\&. It should contain a single newline\-terminated hostname string\&. Comments (lines starting with a `#\*(Aq) are ignored\&. The hostname may be a free\-form string up to 64 characters in length; however, it is recommended that it consists only of 7\-bit ASCII lower\-case characters and no spaces or dots, and limits itself to the format allowed for DNS domain name labels, even though this is not a strict requirement\&.
.PP
You may use
\fBhostnamectl\fR(1)
to change the value of this file during runtime from the command line\&. Use
\fBsystemd-firstboot\fR(1)
to initialize it on mounted (but not booted) system images\&.
.SH "HISTORY"
.PP
The simple configuration file format of
/etc/hostname
originates from Debian GNU/Linux\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsethostname\fR(2),
\fBhostname\fR(1),
\fBhostname\fR(7),
\fBmachine-id\fR(5),
\fBmachine-info\fR(5),
\fBhostnamectl\fR(1),
\fBsystemd-hostnamed.service\fR(8),
\fBsystemd-firstboot\fR(1)
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