--- /dev/null
+# $NetBSD: hosts,v 1.9 2013/11/24 07:20:01 dholland Exp $
+#
+# Host name database.
+#
+# This file contains addresses and aliases for local hosts whose names
+# need to be resolvable during system boot; typically this includes only
+# the address and FQDN for this machine's hostname.
+#
+# By default this file is consulted before DNS, so adding additional
+# material here that then becomes out of date can lead to confusion.
+# See nsswitch.conf(5).
+#
+::1 localhost localhost.
+127.0.0.1 localhost localhost.
+#
+# RFC 1918 specifies that these networks are "internal":
+# 10.0.0.0 - 10.255.255.255 (10/8 prefix)
+# 172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
+# 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
--- /dev/null
+.\" $NetBSD: hosts.5,v 1.13 2003/08/07 10:31:17 agc Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 1993
+.\" The Regents of the University of California. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" @(#)hosts.5 8.2 (Berkeley) 12/11/93
+.\"
+.Dd November 17, 2000
+.Dt HOSTS 5
+.Os
+.Sh NAME
+.Nm hosts
+.Nd host name data base
+.Sh DESCRIPTION
+The
+.Nm hosts
+file contains information regarding the known hosts on the network.
+It can be used in conjunction with the DNS, and the
+.Tn NIS
+maps
+.Sq hosts.byaddr ,
+and
+.Sq hosts.byname ,
+as controlled by
+.Xr nsswitch.conf 5 .
+.Pp
+For each host a single line should be present
+with the following information:
+.Dl address hostname [alias ...]
+.Pp
+These are:
+.Bl -tag -width hostname -compact -offset indent
+.It Em address
+Internet address
+.It Em hostname
+Official host name
+.It Em alias
+Alias host name
+.El
+.Pp
+Items are separated by any number of blanks and/or
+tab characters. A hash sign
+.Pq Dq \&#
+indicates the beginning of
+a comment; characters up to the end of the line are
+not interpreted by routines which search the file.
+.Pp
+When using the name server
+.Xr named 8 ,
+or
+.Xr ypserv 8 ,
+this file provides a backup when the name server
+is not running.
+For the name server, it is suggested that only a few addresses
+be included in this file.
+These include address for the local interfaces that
+.Xr ifconfig 8
+needs at boot time and a few machines on the local network.
+.Pp
+This file may be created from the official host
+data base maintained at the Network Information Control
+Center
+.Pq Tn 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
+.Tn NIC
+is incomplete, use of the name server is recommended for
+sites on the
+.Tn DARPA
+Internet.
+.Pp
+As network addresses, both IPv4 and IPv6 addresses are allowed.
+IPv4 addresses are specified in the conventional dot
+.Pq Dq \&.
+notation using the
+.Xr inet_pton 3
+routine
+from the Internet address manipulation library,
+.Xr inet 3 .
+IPv6 addresses are specified in the standard hex-and-colon notation.
+Host names may contain any printable
+character other than a field delimiter, newline,
+or comment character.
+.Sh FILES
+.Bl -tag -width /etc/hosts -compact
+.It Pa /etc/hosts
+The
+.Nm hosts
+file resides in
+.Pa /etc .
+.El
+.Sh SEE ALSO
+.Xr gethostbyname 3 ,
+.Xr nsswitch.conf 5 ,
+.Xr ifconfig 8 ,
+.Xr named 8
+.Rs
+.%T "Name Server Operations Guide for BIND"
+.Re
+.Sh HISTORY
+The
+.Nm
+file format appeared in
+.Bx 4.2 .