/usr/share/octave/packages/ is in octave-odepkg 0.8.5-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/odepkg-0.8.5/
/usr/share/octave/packages/odepkg-0.8.5/bvp4c.m
/usr/share/octave/packages/odepkg-0.8.5/doc-cache
/usr/share/octave/packages/odepkg-0.8.5/ode23.m
/usr/share/octave/packages/odepkg-0.8.5/ode23d.m
/usr/share/octave/packages/odepkg-0.8.5/ode23s.m
/usr/share/octave/packages/odepkg-0.8.5/ode45.m
/usr/share/octave/packages/odepkg-0.8.5/ode45d.m
/usr/share/octave/packages/odepkg-0.8.5/ode54.m
/usr/share/octave/packages/odepkg-0.8.5/ode54d.m
/usr/share/octave/packages/odepkg-0.8.5/ode78.m
/usr/share/octave/packages/odepkg-0.8.5/ode78d.m
/usr/share/octave/packages/odepkg-0.8.5/odebwe.m
/usr/share/octave/packages/odepkg-0.8.5/odeexamples.m
/usr/share/octave/packages/odepkg-0.8.5/odeget.m
/usr/share/octave/packages/odepkg-0.8.5/odephas2.m
/usr/share/octave/packages/odepkg-0.8.5/odephas3.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_event_handle.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_examples_dae.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_examples_dde.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_examples_ide.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_examples_ode.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_structure_check.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_calcmescd.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_calcscd.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_chemakzo.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_hires.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_implakzo.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_implrober.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_impltrans.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_oregonator.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_pollution.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_robertson.m
/usr/share/octave/packages/odepkg-0.8.5/odepkg_testsuite_transistor.m
/usr/share/octave/packages/odepkg-0.8.5/odeplot.m
/usr/share/octave/packages/odepkg-0.8.5/odeprint.m
/usr/share/octave/packages/odepkg-0.8.5/odeset.m
/usr/share/octave/packages/odepkg-0.8.5/packinfo/
/usr/share/octave/packages/odepkg-0.8.5/packinfo/DESCRIPTION
/usr/share/octave/packages/odepkg-0.8.5/packinfo/INDEX
/usr/share/octave/packages/odepkg-0.8.5/packinfo/NEWS