hostname: Print or set system name
With no arguments,
hostname prints the name of the current host
system. With one argument, it sets the current host name to the
specified string. You must have appropriate privileges to set the host
The only options are --help and --version. See Common options.
hostname is not installed by default, and other packages
also supply a
hostname command, so portable scripts should
not rely on its existence or on the exact behavior documented above.
An exit status of zero indicates success, and a nonzero value indicates failure.