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1.1 root 1: .\" Copyright (c) 1983 Regents of the University of California.
2: .\" All rights reserved. The Berkeley software License Agreement
3: .\" specifies the terms and conditions for redistribution.
4: .\"
5: .\" @(#)hosts.5 6.3 (Berkeley) 5/14/86
6: .\"
7: .TH HOSTS 5 "May 14, 1986"
8: .UC 5
9: .SH NAME
10: hosts \- host name data base
11: .SH DESCRIPTION
12: The
13: .I hosts
14: file contains information regarding
15: the known hosts on the network.
16: For each host a single line should be present
17: with the following information:
18: .HP 10
19: official host name
20: .br
21: .ns
22: .HP 10
23: Internet address
24: .br
25: .ns
26: .HP 10
27: aliases
28: .PP
29: Items are separated by any number of blanks and/or
30: tab characters. A ``#'' indicates the beginning of
31: a comment; characters up to the end of the line are
32: not interpreted by routines which search the file.
33: .PP
34: When using the name server
35: .IR named (8),
36: this file provides a backup when the name server
37: is not running.
38: For the name server, it is suggested that only a few addresses
39: be included in this file.
40: These include address for the local interfaces that
41: .IR ifconfig (8C)
42: needs at boot time and a few machines on the local network.
43: .PP
44: This file may be created from the official host
45: data base maintained at the Network Information Control
46: Center (NIC), though local changes may be required
47: to bring it up to date regarding unofficial aliases
48: and/or unknown hosts. As the data base maintained at NIC
49: is incomplete, use of the name server is recommend for
50: sites on the DARPA Internet.
51: .PP
52: Network addresses are specified in the conventional
53: ``.'' notation using the \fIinet_addr\fP() routine
54: from the Internet address manipulation library,
55: .IR inet (3N).
56: Host names may contain any printable
57: character other than a field delimiter, newline,
58: or comment character.
59: .SH FILES
60: /etc/hosts
61: .SH "SEE ALSO"
62: gethostbyname(3N), ifconfig(8C), named(8)
63: .br
64: Name Server Operations Guide for BIND
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