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+.\" 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. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. 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.
+.\"
+.\"     @(#)networks.5	8.1 (Berkeley) 6/5/93
+.\"
+.Dd June 5, 1993
+.Dt NETWORKS 5
+.Os BSD 4.2
+.Sh NAME
+.Nm networks
+.Nd network name data base
+.Sh DESCRIPTION
+The
+.Xr networks
+file contains information regarding
+the known networks which comprise the
+.Tn DARPA
+Internet.
+For each network a single line should be present with the following information:
+.Bd -unfilled -offset indent
+official network name
+network number
+aliases
+.Ed
+.Pp
+Items are separated by any number of blanks and/or tab characters.
+A ``#'' indicates the beginning of a comment; characters up to the end of
+the line are not interpreted by routines which search the file.
+This file is normally created from the official network 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 networks.
+.Pp
+Network number may be specified in the conventional
+``.''  (dot) notation using the
+.Xr inet_network 3
+routine
+from the Internet address manipulation library,
+.Xr inet 3 .
+Network names may contain any printable character other than a field
+delimiter, newline, or comment character.
+.Sh FILES
+.Bl -tag -width /etc/networks -compact
+.It Pa /etc/networks
+The
+.Nm networks
+file resides in
+.Pa /etc .
+.El
+.Sh SEE ALSO
+.Xr getnetent 3
+.Sh BUGS
+A name server should be used instead of a static file.
+.Sh HISTORY
+The
+.Nm
+file format appeared in
+.Bx 4.2 .