This is a cheat sheet for DNF.

This is a cheat sheet for Pacman.

Yet another actual story

This is a cheat sheet for Macports.

Brew is used to install applications for macOS. The kind of applications that it can be used to install, are Unix, and GUI.app applications. An example of a Unix application is nginx, or any other Linux, or BSD application. An example of a GUI.app macOS application, is google chrome, or any application, in the Applications folder...

This is a cheat sheet for Brew.