dpkg-query

List all installed packages

$ dpkg-query -l

$ dpkg-query -l '[libc6*]'

$ dpkg-query -L [libc6]

$ dpkg-query -s [libc6]

$ dpkg-query -S [/etc/ld.so.conf.d]

dpkg-query action [options] [pattern|package]

dpkg-query queries the dpkg database for information about installed packages. It can list packages, show their status, list files they contain, or find which package owns a file.

-l, --list [pattern]

List packages matching pattern

List files installed by package

Show package status and information

Find packages owning files matching pattern

Show package in specified format

Custom output format

Only queries installed packages, not repositories. Pattern uses shell glob syntax, not regex. Part of dpkg package.

dpkg(1), apt-cache(8), dpkg-deb(1)