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espec:man-hosts [2008/06/11 15:53] (atual)
maziero created
Linha 1: Linha 1:
 +<​code>​
 +HOSTS(5) ​                  Linux Programmer'​s Manual ​                 HOSTS(5)
  
 +
 +
 +NAME
 +       hosts - The static table lookup for host names
 +
 +SYNOPSIS
 +       /​etc/​hosts
 +
 +DESCRIPTION
 +       ​This ​ manual ​ page  describes ​ the format of the __________ file.  This
 +       file is a simple text file that associates IP addresses with hostnames,
 +       one line per IP address. ​ For each host a single line should be present
 +       with the following information:​
 +
 +              IP_address canonical_hostname [aliases...]
 +
 +       ​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 __________
 +       file or host name lookup, and frees a host from relying ​ on  __________
 +       being up to date and complete.
 +
 +       ​In ​ modern ​ systems, ​ even though the host table has been superseded by
 +       DNS, it is still widely used for:
 +
 +       ​bootstrapping
 +              Most systems have a small host table  containing ​ the  name  and
 +              address ​ information ​ for  important hosts on the local network.
 +              This is useful when DNS is not running, for example during ​ sys-
 +              tem bootup.
 +
 +       ​NIS ​   Sites  that  use NIS use the host table as input to the NIS host
 +              database. ​ Even though NIS can be used with DNS, most NIS  sites
 +              still  use the host table with an entry for all local hosts as a
 +              backup.
 +
 +       ​isolated nodes
 +              Very small sites that are isolated from the network use the host
 +              table  instead of DNS.  If the local information rarely changes,
 +              and the network is not connected to  the  Internet, ​ DNS  offers
 +              little advantage.
 +
 +FILES
 +       ​__________
 +
 +NOTES
 +       ​Modifications ​ to this file normally take effect immediately,​ except in
 +       cases where the file is cached by applications.
 +
 +   ​Historical Notes
 +       RFC 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  cre-
 +       ​ated ​ from the official host data base maintained at the Network Infor-
 +       ​mation 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.
 +
 +EXAMPLE
 +       ​127.0.0.1 ​      ​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 ALSO
 +       ​hostname(1),​ resolver(3),​ resolver(5),​ hostname(7),​ named(8), ​ Internet
 +       RFC 952
 +
 +COLOPHON
 +       ​This ​ page  is  part of release 2.77 of the Linux _________ project. ​ A
 +       ​description of the project, and information about reporting ​ bugs,  can
 +       be found at http://​www.kernel.org/​doc/​man-pages/​.
 +
 +
 +
 +Linux                             ​2002-06-16 ​                         HOSTS(5)
 +</​code>​
espec/man-hosts.txt · Última modificação: 2008/06/11 15:53 por maziero