/usr/share/octave/packages/ is in octave-plot 1.1.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/plot-1.1.0/
/usr/share/octave/packages/plot-1.1.0/doc-cache
/usr/share/octave/packages/plot-1.1.0/dxfwrite.m
/usr/share/octave/packages/plot-1.1.0/gplot3.m
/usr/share/octave/packages/plot-1.1.0/hist2d.m
/usr/share/octave/packages/plot-1.1.0/packinfo/
/usr/share/octave/packages/plot-1.1.0/packinfo/.autoload
/usr/share/octave/packages/plot-1.1.0/packinfo/DESCRIPTION
/usr/share/octave/packages/plot-1.1.0/packinfo/INDEX
/usr/share/octave/packages/plot-1.1.0/plotdecimate.m
/usr/share/octave/packages/plot-1.1.0/tics.m
/usr/share/octave/packages/plot-1.1.0/tricontour.m
/usr/share/octave/packages/plot-1.1.0/zoom.m