/usr/share/octave/ is in octave-secs1d 0.0.9-2.
This file is owned by root:root, with mode 0o755.
..
/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/.autoload
/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