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Services

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Services File

Typically found at /etc/services.

The services file contains information regarding the known services available in the DARPA 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.

serviceToPort

Get the port number associated with a service

Usage

serviceToPort service [ --services servicesFile ] [ --help ]

Get the port number associated with a service

Arguments

  • service - String. Required. A unix service typically found in /etc/services
  • --services servicesFile - File. Optional. File like '/etc/services`.
  • --help - Flag. Optional. Display this help.

Sample Output

Port number of associated service (integer) one per line

Return codes

  • 1 - service not found
  • 2 - bad argument or invalid port
  • 0 - service found and output is an integer

serviceToStandardPort

Hard-coded services for:

Usage

serviceToStandardPort [ --help ] [ service ... ]

Hard-coded services for: - ssh -> 22 - http-> 80 - https-> 80 - postgres-> 5432 - mariadb-> 3306 - mysql-> 3306 Backup when /etc/services does not exist.

Arguments

  • --help - Flag. Optional. Display this help.
  • service ... - String. Optional. A unix service typically found in /etc/services

Sample Output

Port number of associated service (integer) one per line

Return codes

  • 1 - service not found
  • 0 - service found and output is an integer

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