services man page on FreeBSD

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SERVICES(5)		    BSD File Formats Manual		   SERVICES(5)

     services — service name data base

     The services file contains information regarding the known services
     available in the Internet.	 For each service a single line should be
     present with the following information:

	   official service name
	   port number
	   protocol name

     Items are separated by any number of blanks and/or tab characters.	 The
     port number and protocol name are considered a single item; a ``/'' is
     used to separate the port and protocol (e.g. ``512/tcp'').	 A ``#'' indi‐
     cates the beginning of a comment; subsequent characters up to the end of
     the line are not interpreted by the routines which search the file.

     Service names may contain any printable character other than a field
     delimiter, newline, or comment character.

     If “db” is specified as source in the nsswitch.conf(5),
     /var/db/services.db is searched.  The database in /var/db/services.db
     needs to be updated with services_mkdb(8) after changes to the services
     file have been applied.

     Access to the NIS services.byname map can be enabled by adding a single
     ``+'' on a line by itself in the /etc/services file.  This causes the
     contents of the NIS services map to be inserted at the location where the
     ``+'' appears.

     /etc/services  The services file resides in /etc.

     getservent(3) nsswitch.conf(5) services_mkdb(8)

     The services file format appeared in 4.2BSD.

     A name server should be used instead of a static file.

BSD				 April 4, 2010				   BSD

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