rpm -ql
gem list
brew list
apt list
Package managers: dpkg, APT, RPM, YUM, DNF, homebrew, pkgutil, opkg, Helm, pkg and snap, npm, Aptitude, alien, Conan, CRAN, Chocolatey, NuGet, PackageKit, Wajig, pacman, PIP, Apache Ivy, List packages, List files in packages, Spack