Wonder that I could not find the deb equivalent of
rpm -q whatrequires <installed package>
All I can find is either the equivalent of rpm -q requires or the whatrequires for a yet to be installed deb package.
If this is already answered please accept my appologies and point me to the right place.
I think you're looking for apt-cache rdepends <package> which will list all packages with a dependency on <package>. Normally this shows all packages, whether installed or not - apt-cache rdepends --installed <package> restricts the results to installed packages.
A search finds other similar questions, but since none of them make a comparison to rpm, I don't think this is a duplicate.
