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Man Pages


Manual Reference Pages  -  SERVICES (5)

NAME

services - service name data base

CONTENTS

Description
Nis Interaction
Files
See Also
History
Bugs

DESCRIPTION

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
aliases

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 ‘‘#’’ indicates 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.

NIS INTERACTION

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.

FILES

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

SEE ALSO

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

HISTORY

The services file format appeared in BSD 4.2 .

BUGS

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