man5/networks.5

   1 .\" Copyright (c) 2001 Martin Schulze <joey@infodrom.org>
   2 .\"
   3 .\" SPDX-License-Identifier: GPL-2.0-or-later
   4 .\"
   5 .\" 2008-09-04, mtk, taken from Debian downstream, with a few light edits
   6 .\"
   7 .TH NETWORKS 5 2008-09-04 "Linux man-pages (unreleased)"
   8 .SH NAME
   9 networks \- network name information
  10 .SH DESCRIPTION
  11 The file
  12 .I /etc/networks
  13 is a plain ASCII file that describes known DARPA networks and symbolic
  14 names for these networks.
  15 Each line represents a network and has the following structure:
  16 .PP
  17 .RS
  18 .I name number aliases ...
  19 .RE
  20 .PP
  21 where the fields are delimited by spaces or tabs.
  22 Empty lines are ignored.
  23 The hash character (\fB#\fP) indicates the start of a comment:
  24 this character, and the remaining characters up to
  25 the end of the current line,
  26 are ignored by library functions that process the file.
  27 .PP
  28 The field descriptions are:
  29 .TP
  30 .I name
  31 The symbolic name for the network.
  32 Network names can contain any printable characters except
  33 white-space characters or the comment character.
  34 .TP
  35 .I number
  36 The official number for this network in numbers-and-dots notation (see
  37 .BR inet (3)).
  38 The trailing ".0" (for the host component of the network address)
  39 may be omitted.
  40 .TP
  41 .I aliases
  42 Optional aliases for the network.
  43 .PP
  44 This file is read by the
  45 .BR route (8)
  46 and
  47 .BR netstat (8)
  48 utilities.
  49 Only Class A, B, or C networks are supported, partitioned networks
  50 (i.e., network/26 or network/28) are not supported by this file.
  51 .SH FILES
  52 .TP
  53 .I /etc/networks
  54 The networks definition file.
  55 .SH SEE ALSO
  56 .BR getnetbyaddr (3),
  57 .BR getnetbyname (3),
  58 .BR getnetent (3),
  59 .BR netstat (8),
  60 .BR route (8)