Lack of memory on computers is less of a problem than it was in the past. Instead, the opposite problem is more common: In two or three terabytes, files can be easily hidden that could be deleted. If the misplaced files are package files, they can can become a security problem and interfere with the installation of new packages or, worse still, system updates.
In 2011, Raphaël Hertzog, the founder of Freexian, posted a series of five blogs with the running title of “Debian Cleanup Tips” that explains how to locate different types of misplaced files – mostly for packages – and deal with them [1]. Specifically, he mentions cruft (unneeded clutter), configuration files, obsolete packages, third-party packages, and broken packages. Hertzog’s tips remain relevant today, so I thought it…