dpkg-query

A tool that shows information about installed packages. More information: https://manpages.debian.org/latest/dpkg/dpkg-query.1.html.

List all installed packages:

dpkg-query -l

List installed packages matching a pattern:

dpkg-query -l '{{pattern}}'

List all files installed by a package:

dpkg-query -L {{package_name}}

Show information about a package:

dpkg-query -s {{package_name}}