08-25-2002
Quickest way to see if a port is in use is to simply use the 'netstat' command and grep for the port you are interested in. Also note that port alias names can be configured in '/etc/services' thus if a port does not appear to be in use check if an alias exists and grep accordingly.
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LEARN ABOUT DEBIAN
nrports
NRPORTS(5) Linux Programmer's Manual NRPORTS(5)
NAME
nrports - NET/ROM port configuration file.
DESCRIPTION
Nrports is an ASCII file that contains information about each of the NET/ROM ports that are to be used. When dealing with an NET/ROM util-
ity such as call, it takes an optional argument that is the port name. This port name is a reference to the line within nrports, which has
the same name. The information on each line contains enough information to bind the command to a particular NET/ROM interface, this binding
is done by matching the callsign on the line in nrports with the callsign of the port set by ifconfig.
The nrports file may contain comments that begin with a # in the first column, or a port description in the following format, each field
being delimited by white space:
name callsign alias paclen description
The field descriptions are:
name this is the unique NET/ROM port identifier.
callsign the callsign of the NET/ROM interface to bind to.
alias this is the alias of the NET/ROM port.
paclen is the default packet size for this interface.
description a free format description of this interface, this field extends to the end of the line. It may contain spaces.
FILES
/etc/ax25/nrports
SEE ALSO
call(1), netrom(4), ifconfig(8), nrparms(8).
Linux 2 August 1996 NRPORTS(5)