deborphan and check the
$ apt-cache show deborphan
Status: install ok installed
Maintainer: deborphan devel team
Depends: libc6 (>= 2.7)
Recommends: apt, dialog, gettext-base
Description: program that can find unused packages, e.g. libraries
deborphan finds "orphaned" packages on your system. It determines which
packages have no other packages depending on their installation and shows
you a list of these packages. It is most useful when finding libraries,
but it can be used on packages in all sections.
This package also includes orphaner, a text menu frontend to deborphan.
Please install the recommended packages dialog, gettext-base and apt when
you want a working and fully featured orphaner.
If launched without arguments, it will display a curses interface showing orphaned packages. You can dry-run a test or perform a purge of those packages.