looking for info from dpkg

["Damir J. Naden" <dnaden@inforamp.net>]

G'day --

Could anyone tell me if there is an option in dpkg command line which will
tell me what packages are _not_ used and/or needed but already installed?
I have recently discovered hat I had isapnp-related package installed on my
system, but I do not recall ever putting that package on the system (it may
have come during initial install from floppies, who knows..). When I purged it
I had no problems whatsoever, specially in the view that I do not have any
cards that would not work without it. Now my curiosity would not let me alone
until I find out if there are any other packages on the system (installed and
not needed)

Any info or pointer to the info is welcome,

TIA
damir


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