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by rahen 1499 days ago
The split is even stronger on NetBSD, where /usr is the base OS and /usr/pkg what's installed by the user through pkgin (binary packages) or pkgsrc (ports).

Likewise, the system configuration goes to /etc while the userland configuration goes to /usr/pkg/etc.

All it takes to factory reset a NetBSD system is an rm -Rf /usr/pkg.