projects / unix-history / blame
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|---|---|---|
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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 | .\" | |
| df1ff6ff | 5 | .\" @(#)hosts.5 6.3 (Berkeley) %G% |
| 43624042 | 6 | .\" |
| 8612bf3c | 7 | .TH HOSTS 5 "" |
| 43624042 KM |
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 | |
| df1ff6ff | 15 | the known hosts on the network. |
| 43624042 KM |
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. | |
| df1ff6ff JB |
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 | |
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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 | |
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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. | |
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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" | |
| df1ff6ff JB |
62 | gethostbyname(3N), ifconfig(8C), named(8) |
| 63 | .br | |
| 64 | Name Server Operations Guide for BIND |