dpkg-query

Display information about installed packages. More information: https://manpages.debian.org/latest/dpkg/dpkg-query.1.html.

• List all installed packages:

dpkg-query --list

• List installed packages matching a pattern:

dpkg-query --list '{{libc6*}}'

• List all files installed by a package:

dpkg-query --listfiles {{libc6}}

• Show information about a package:

dpkg-query --status {{libc6}}

• Search for packages that own files matching a pattern:

dpkg-query --search {{/etc/ld.so.conf.d}}