/usr/ is in octave-optiminterp 0.3.4-4.
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/
/usr/lib/x86_64-linux-gnu/octave/packages/optiminterp-0.3.4/
/usr/lib/x86_64-linux-gnu/octave/packages/optiminterp-0.3.4/x86_64-pc-linux-gnu-api-v51/
/usr/lib/x86_64-linux-gnu/octave/packages/optiminterp-0.3.4/x86_64-pc-linux-gnu-api-v51/optiminterp.oct
/usr/share/
/usr/share/doc/
/usr/share/doc/octave-optiminterp/
/usr/share/doc/octave-optiminterp/changelog.Debian.gz
/usr/share/doc/octave-optiminterp/copyright
/usr/share/octave/
/usr/share/octave/packages/
/usr/share/octave/packages/optiminterp-0.3.4/
/usr/share/octave/packages/optiminterp-0.3.4/doc-cache
/usr/share/octave/packages/optiminterp-0.3.4/example_optiminterp.m
/usr/share/octave/packages/optiminterp-0.3.4/optiminterp1.m
/usr/share/octave/packages/optiminterp-0.3.4/optiminterp2.m
/usr/share/octave/packages/optiminterp-0.3.4/optiminterp3.m
/usr/share/octave/packages/optiminterp-0.3.4/optiminterp4.m
/usr/share/octave/packages/optiminterp-0.3.4/optiminterpn.m
/usr/share/octave/packages/optiminterp-0.3.4/packinfo/
/usr/share/octave/packages/optiminterp-0.3.4/packinfo/DESCRIPTION
/usr/share/octave/packages/optiminterp-0.3.4/packinfo/INDEX
/usr/share/octave/packages/optiminterp-0.3.4/packinfo/NEWS
/usr/share/octave/packages/optiminterp-0.3.4/test_optiminterp.m
/usr/share/octave/packages/optiminterp-0.3.4/test_optiminterp_err.m
/usr/share/octave/packages/optiminterp-0.3.4/test_optiminterp_mult.m
/usr/share/doc/octave-optiminterp/NEWS