/usr/ is in octave-miscellaneous 1.2.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/octave/
/usr/lib/x86_64-linux-gnu/octave/packages/
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/usr/lib/x86_64-linux-gnu/octave/packages/miscellaneous-1.2.1/
/usr/lib/x86_64-linux-gnu/octave/packages/miscellaneous-1.2.1/x86_64-pc-linux-gnu-api-v51/
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/usr/share/
/usr/share/doc/
/usr/share/doc/octave-miscellaneous/
/usr/share/doc/octave-miscellaneous/changelog.Debian.gz
/usr/share/doc/octave-miscellaneous/copyright
/usr/share/octave/
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/usr/share/doc/octave-miscellaneous/NEWS