/usr/share/octave/packages/ is in octave-fpl 1.3.5-4.
This file is owned by root:root, with mode 0o755.
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/usr/share/octave/packages/fpl-1.3.5/
/usr/share/octave/packages/fpl-1.3.5/doc-cache
/usr/share/octave/packages/fpl-1.3.5/fpl_vtk_assemble_series.m
/usr/share/octave/packages/fpl-1.3.5/fpl_vtk_b64_write_field.m
/usr/share/octave/packages/fpl-1.3.5/fpl_vtk_raw_write_field.m
/usr/share/octave/packages/fpl-1.3.5/fpl_vtk_write_field.m
/usr/share/octave/packages/fpl-1.3.5/packinfo/
/usr/share/octave/packages/fpl-1.3.5/packinfo/DESCRIPTION
/usr/share/octave/packages/fpl-1.3.5/packinfo/INDEX
/usr/share/octave/packages/fpl-1.3.5/packinfo/NEWS
/usr/share/octave/packages/fpl-1.3.5/pdemesh.m
/usr/share/octave/packages/fpl-1.3.5/pdesurf.m
/usr/share/octave/packages/fpl-1.3.5/savevtk.m
/usr/share/octave/packages/fpl-1.3.5/savevtkvector.m