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Service name database (UNIX)
/etc/services
The /etc/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
For example:
ftp 21/tcp
The fields are as follows:
- ftp
- Service name.
- 21
- Port number.
- tcp
- Protocol name.
Items are separated by any number of blanks, tabs, or both.
The port_number and protocol_name are
considered a single item; a / is used to separate
the two (e.g. 512/tcp).
A # in a line indicates the beginning of a comment
— any characters after a #, up to the end of
the line, aren't interpreted by the routines that search the
file.
Service names may contain any printable character other than
a field delimiter, newline, or comment character.
inetd
getservent()
in the Library Reference
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