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You can set any radtest variable from the command line.
There are two ways of doing so.
First, you can use variable assignment option --assign (or -a). Its syntax is:
--assign variable=text -a variable=text
For example:
radtest -a foobar=5
Another way is useful when you load a radtest program by
--file or -f. This second way consists in including
a variable assignment in the form
variable=text
in the command line after the script name. For example:
radtest -f myprog.rad foo=5 addr=127.0.0.1
This method is especially useful for executable scripts that are
run using #! shell magic. Consider a simple script:
#! /usr/local/bin/radtest -f print $addr
The value of addr can be given to the script from the command line as in the example below:
myprog.rad addr=127.0.0.1