projects / unix-history / blame
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1 | .\" Copyright (c) 1983 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| 43624042 | 3 | .\" |
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4 | .\" Redistribution and use in source and binary forms are permitted |
| 5 | .\" provided that the above copyright notice and this paragraph are | |
| 6 | .\" duplicated in all such forms and that any documentation, | |
| 7 | .\" advertising materials, and other materials related to such | |
| 8 | .\" distribution and use acknowledge that the software was developed | |
| 9 | .\" by the University of California, Berkeley. The name of the | |
| 10 | .\" University may not be used to endorse or promote products derived | |
| 11 | .\" from this software without specific prior written permission. | |
| 12 | .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 13 | .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 14 | .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 15 | .\" | |
| 16 | .\" @(#)hosts.5 6.4 (Berkeley) %G% | |
| 43624042 | 17 | .\" |
| 8612bf3c | 18 | .TH HOSTS 5 "" |
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19 | .UC 5 |
| 20 | .SH NAME | |
| 21 | hosts \- host name data base | |
| 22 | .SH DESCRIPTION | |
| 23 | The | |
| 24 | .I hosts | |
| 25 | file contains information regarding | |
| df1ff6ff | 26 | the known hosts on the network. |
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27 | For each host a single line should be present |
| 28 | with the following information: | |
| 29 | .HP 10 | |
| 30 | official host name | |
| 31 | .br | |
| 32 | .ns | |
| 33 | .HP 10 | |
| 34 | Internet address | |
| 35 | .br | |
| 36 | .ns | |
| 37 | .HP 10 | |
| 38 | aliases | |
| 39 | .PP | |
| 40 | Items are separated by any number of blanks and/or | |
| 41 | tab characters. A ``#'' indicates the beginning of | |
| 42 | a comment; characters up to the end of the line are | |
| 43 | not interpreted by routines which search the file. | |
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44 | .PP |
| 45 | When using the name server | |
| 46 | .IR named (8), | |
| 47 | this file provides a backup when the name server | |
| 48 | is not running. | |
| 49 | For the name server, it is suggested that only a few addresses | |
| 50 | be included in this file. | |
| 51 | These include address for the local interfaces that | |
| 52 | .IR ifconfig (8C) | |
| 53 | needs at boot time and a few machines on the local network. | |
| 54 | .PP | |
| 55 | This file may be created from the official host | |
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56 | data base maintained at the Network Information Control |
| 57 | Center (NIC), though local changes may be required | |
| 58 | to bring it up to date regarding unofficial aliases | |
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59 | and/or unknown hosts. As the data base maintained at NIC |
| 60 | is incomplete, use of the name server is recommend for | |
| 61 | sites on the DARPA Internet. | |
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62 | .PP |
| 63 | Network addresses are specified in the conventional | |
| 64 | ``.'' notation using the \fIinet_addr\fP() routine | |
| 65 | from the Internet address manipulation library, | |
| 66 | .IR inet (3N). | |
| 67 | Host names may contain any printable | |
| 68 | character other than a field delimiter, newline, | |
| 69 | or comment character. | |
| 70 | .SH FILES | |
| 71 | /etc/hosts | |
| 72 | .SH "SEE ALSO" | |
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73 | gethostbyname(3N), ifconfig(8C), named(8) |
| 74 | .br | |
| 75 | Name Server Operations Guide for BIND |