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hosts(4)							     hosts(4)



NAME
  hosts	- The host name	data base

SYNOPSIS

  /etc/hosts

DESCRIPTION

  The hosts file contains information regarding	the known hosts	on the net-
  work.	 For each host a single	line should be present with the	following
  information:

	IP_address canonical_hostname aliases

  Items	are separated by any number of blanks and/or tab characters.  The #
  (number sign)	indicates the beginning	of a comment; characters up to the
  end of the line are not interpreted by routines which	search the file.

  The following	is an example of an /etc/hosts file:

       127.0.0.1	 localhost
       192.168.201.38	 esterbrook.stylos.plume.net   esterbrook este es
       192.168.201.3	 wirt.stylos.plume.net	       wirt	# DNS server
       192.168.201.6	 eclipse.stylos.plume.net      eclipse	# DNS server
       192.168.112.155	 carter.stylos.plume.net       carter	# NIS server
       192.168.112.163	 chilton.stylos.plume.net      chilton	# NIS server

  The first two	or more	entries	include	the default 127.0.0.1 loopback inter-
  face and any local network interfaces	that the ifconfig command needs	when
  you boot your	system.	 In this case, there is	one (primary) network inter-
  face on the local system.  It	is called esterbrook, but because it has such
  a long name, users on	the local system can refer to it by the	aliases	este
  or es	for convenience.

  The remaining	entries	are for	other hosts in your network.  If you are not
  running a naming service, such as BIND, you need to add an entry for any
  system to which you will refer by a host name.  If you are running a naming
  service, you need only add entries for the most critical systems with	which
  you will communicate.	 In the	event that the naming service fails, the
  hosts	file will serve	as a backup.

  This file may	be created from	the official host data base maintained at the
  Network Information Control Center (NIC), though local changes may be
  required to bring it up to date regarding unofficial aliases and/or unknown
  hosts.  As the data base maintained at NIC is	incomplete, use	of the name
  server is recommend for sites	on the DARPA Internet.

  Network addresses are	specified in the conventional .	notation using the
  inet_addr() routine from the Internet	address	manipulation library,
  inet_addr(3).	 Host names may	contain	any printable character	other than a
  field	delimiter, newline, or comment character.

RELATED	INFORMATION

  Commands: ifconfig(8), named(8)

  Functions: gethostbyname(3)