hostname

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hostname

(1)
(Or "sitename"). The unique name by which a computer is known on a network, used to identify it in electronic mail, Usenet news, or other forms of electronic information interchange.

On the Internet the hostname is an ASCII string, e.g. "foldoc.doc.ic.ac.uk" which, consists of a local part (foldoc) and a domain name (doc.ic.ac.uk). The hostname is translated into an Internet address either via the hosts file, NIS or by the Domain Name System (DNS) or resolver. It is possible for one computer to have several hostnames (aliases) though one is designated as its canonical name.

It is often possible to guess a hostname for a particular institution. This is useful if you want to know if they operate network services like anonymous FTP, World-Wide Web or finger. First try the institution's name or obvious abbreviations thereof, with the appropriate domain appended, e.g. "mit.edu". If this fails, prepend "ftp." or "www." as appropriate, e.g. "www.data-io.com". You can use the ping command as a quick way to test whether a hostname is valid.

The folklore interest of hostnames stems from the creativity and humour they often display. Interpreting a sitename is not unlike interpreting a vanity licence plate; one has to mentally unpack it, allowing for mono-case and length restrictions and the lack of whitespace. Hacker tradition deprecates dull, institutional-sounding names in favour of punchy, humorous, and clever coinages (except that it is considered appropriate for the official public gateway machine of an organisation to bear the organisation's name or acronym). Mythological references, cartoon characters, animal names, and allusions to SF or fantasy literature are probably the most popular sources for sitenames (in roughly descending order). The obligatory comment is Harris's Lament: "All the good ones are taken!"

See also network address.

hostname

(2)
Berkeley Unix command to set and get the application level name used by the host.

Unix manual page: hostname(1).

hostname

The name assigned to a workstation or server in a network. In a Windows local area network, computers are given alphanumeric hostnames up to 15 characters in length with no spaces. For example, Maria's computer could be named maria or workstation3 or hplaptop003.

Internet Hostnames
On the Internet, a hostname is part of the address typed into a browser to access a Web site. Traditionally, WWW has been used for Web server hostnames. However, most Web sites can be addressed without the WWW, because the HTTP server (Web server) network port number 80 is automatically passed to the correct server by the routing or firewall equipment whether the WWW is present or not. See HOSTS file, IP address, FQDN and DNS.


The Format of an Internet Address
The hostname follows the protocol in a Web address. However, due to the ways Web servers can be shared, distributed, virtualized and clustered, merely looking at a domain name cannot really determine the true name of the host computer that will respond to the request.
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