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Namehosts — The static table lookup for host names Synopsis/etc/hosts DESCRIPTIONThis manual page describes the format of the
Fields of the entry are separated by any number of blanks
and/or tab characters. Text from a "#" character until the
end of the line is a comment, and is ignored. Host names may
contain only alphanumeric characters, minus signs
("−"), and periods ("."). They must begin with an
alphabetic character and end with an alphanumeric character.
Optional aliases provide for name changes, alternate
spellings, shorter hostnames, or generic hostnames (for
example, The Berkeley Internet Name Domain (BIND) Server implements
the Internet name server for UNIX systems. It augments or
replaces the In modern systems, even though the host table has been superseded by DNS, it is still widely used for:
NOTESModifications to this file normally take effect immediately, except in cases where the file is cached by applications. Historical NotesRFC 952 gave the original format for the host table, though it has since changed. Before the advent of DNS, the host table was the only way of resolving hostnames on the fledgling Internet. Indeed, this file could be created from the official host data base maintained at the Network Information Control Center (NIC), though local changes were often required to bring it up to date regarding unofficial aliases and/or unknown hosts. The NIC no longer maintains the hosts.txt files, though looking around at the time of writing (circa 2000), there are historical hosts.txt files on the WWW. I just found three, from 92, 94, and 95. EXAMPLE127.0.0.1 localhost 192.168.1.10 foo.mydomain.org foo 192.168.1.13 bar.mydomain.org bar 146.82.138.7 master.debian.org master 209.237.226.90 www.opensource.org SEE ALSOhostname(1), resolver(3), resolver(5), hostname(7), named(8), Internet RFC 952
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