/usr/share/ is in octave-secs1d 0.0.9-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/octave-secs1d/
/usr/share/doc/octave-secs1d/changelog.Debian.gz
/usr/share/doc/octave-secs1d/copyright
/usr/share/doc/octave-secs1d/secs1d_manual.pdf.gz
/usr/share/doc-base/
/usr/share/doc-base/octave-scs1d-manual
/usr/share/octave/
/usr/share/octave/packages/
/usr/share/octave/packages/secs1d-0.0.9/
/usr/share/octave/packages/secs1d-0.0.9/doc-cache
/usr/share/octave/packages/secs1d-0.0.9/packinfo/
/usr/share/octave/packages/secs1d-0.0.9/packinfo/DESCRIPTION
/usr/share/octave/packages/secs1d-0.0.9/packinfo/INDEX
/usr/share/octave/packages/secs1d-0.0.9/secs1d_dd_gummel_map.m
/usr/share/octave/packages/secs1d-0.0.9/secs1d_dd_newton.m
/usr/share/octave/packages/secs1d-0.0.9/secs1d_nlpoisson_newton.m
/usr/share/octave/packages/secs1d-0.0.9/secs1d_physical_constants.m
/usr/share/octave/packages/secs1d-0.0.9/secs1d_silicon_material_properties.m