1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)services.5 8.1 (Berkeley) 6/5/93 29.\" 30.Dd April 4, 2010 31.Dt SERVICES 5 32.Os 33.Sh NAME 34.Nm services 35.Nd service name data base 36.Sh DESCRIPTION 37The 38.Nm 39file contains information regarding 40the known services available in the 41Internet. 42For each service a single line should be present 43with the following information: 44.Bd -unfilled -offset indent 45official service name 46port number 47protocol name 48aliases 49.Ed 50.Pp 51Items are separated by any number of blanks and/or tab characters. 52The port number and protocol name are considered a single 53.Em item ; 54a ``/'' is used to 55separate the port and protocol (e.g.\& ``512/tcp''). 56A ``#'' indicates the beginning of 57a comment; subsequent characters up to the end of the line are 58not interpreted by the routines which search the file. 59.Pp 60Service names may contain any printable 61character other than a field delimiter, newline, 62or comment character. 63.Pp 64If 65.Dq db 66is specified as source in the 67.Xr nsswitch.conf 5 , 68.Pa /var/db/services.db 69is searched. 70The database in 71.Pa /var/db/services.db 72needs to be updated with 73.Xr services_mkdb 8 74after changes to the services file have been applied. 75.Sh NIS INTERACTION 76Access to the NIS 77.Pa services.byname 78map can be enabled by adding a single ``+'' on a line by itself 79in the 80.Pa /etc/services 81file. 82This causes the contents of the NIS services map to be inserted 83at the location where the ``+'' appears. 84.Sh FILES 85.Bl -tag -width /etc/services -compact 86.It Pa /etc/services 87The 88.Nm 89file resides in 90.Pa /etc . 91.El 92.Sh SEE ALSO 93.Xr getservent 3 , 94.Xr nsswitch.conf 5 , 95.Xr services_mkdb 8 96.Sh HISTORY 97The 98.Nm 99file format appeared in 100.Bx 4.2 . 101.Sh BUGS 102A name server should be used instead of a static file. 103