hostname

systemd
hostname 5
hostname Local hostname configuration file

`/etc/hostname`

## Description

The `/etc/hostname` file configures the name of the local system that is set during boot using the sethostname 2 system call. It should contain a single newline-terminated hostname string. Comments (lines starting with a `#') 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.

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.

## History

The simple configuration file format of `/etc/hostname` originates from Debian GNU/Linux.

## 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