hostname — Local hostname configuration file
/etc/hostname
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.