hostname - Local hostname configuration file
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. 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.
Depending on the operating system, other configuration files might be checked
for configuration of the hostname as well, however only as fallback.
You may use hostnamectl(1)
to change the value of this file from the
The simple configuration file format of /etc/hostname originates from Debian