Hostnames are domains. A domain is a hierarchical, dot-separated list
of subdomains. For example, the machine monet, in the Berkeley subdomain
of the EDU subdomain of the Internet Domain Name System would be represented
as monet.Berkeley.EDU
The hostname command shows or sets the system's host name.
hostname returns the system's hostname :
localhost.localdomain is the string returned on a system that
was newly created
hostname methane.Jupiter sets the hostname to methane.Jupiter
hostname -s (short host name) returns the first part of the hostname
(to the first dot)
methane would be returned in this case
(Note - BSD does not have this option)
hostname -i returns the ip address for the host
127.0.0.1 was returned here
see ifconfig to configure a network interface
