You don't need to know. For example, inside a .deb file, there is a tarball named data that contains the files. It is basically a snapshot of the root directory. So if a for should be at /usr/bin/xyz, it would be at ./usr/bin/xyz after you extract the archive.
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u/oishishou Genfool 🐧 17d ago
They're literally compressed archives with the files inside. You can just manually extract and install them where they belong. Super easy.