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espec:man-hosts [2008/06/11 15:53] (atual) – created maziero
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 +<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 +       In  modern  systems,  even though the host table has been superseded by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