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Manual Pages  — PROTOCOLS


protocols – protocol name data base



The protocols file contains information regarding the known protocols used in the DARPA Internet. For each protocol a single line should be present with the following information:
official protocol name
protocol number

Items are separated by any number of blanks and/or tab characters. A ``#'' indicates the beginning of a comment; characters up to the end of the line are not interpreted by routines which search the file.

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


  The protocols file resides in /etc.




The protocols file format appeared in BSD 4.2 .


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

PROTOCOLS (5) June 5, 1993

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Please direct any comments about this manual page service to Ben Bullock.

This philosophy, in the hands of amateurs, leads to inexplicably mind-numbing botches like the existence of two programs, “head” and “tail,” which print the first part or the last part of a file, depending. Even though their operations are duals of one another, “head” and “tail” are different programs, written by different authors, and take different options!
— The Unix Haters' handbook