/usr/share/octave/4.2.2/m/pkg/ is in octave-common 4.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/4.2.2/m/pkg/pkg.m
/usr/share/octave/4.2.2/m/pkg/private/
/usr/share/octave/4.2.2/m/pkg/private/build.m
/usr/share/octave/4.2.2/m/pkg/private/configure_make.m
/usr/share/octave/4.2.2/m/pkg/private/default_prefix.m
/usr/share/octave/4.2.2/m/pkg/private/describe.m
/usr/share/octave/4.2.2/m/pkg/private/dirempty.m
/usr/share/octave/4.2.2/m/pkg/private/get_description.m
/usr/share/octave/4.2.2/m/pkg/private/get_forge_download.m
/usr/share/octave/4.2.2/m/pkg/private/get_forge_pkg.m
/usr/share/octave/4.2.2/m/pkg/private/get_unsatisfied_deps.m
/usr/share/octave/4.2.2/m/pkg/private/getarch.m
/usr/share/octave/4.2.2/m/pkg/private/getarchdir.m
/usr/share/octave/4.2.2/m/pkg/private/install.m
/usr/share/octave/4.2.2/m/pkg/private/installed_packages.m
/usr/share/octave/4.2.2/m/pkg/private/list_forge_packages.m
/usr/share/octave/4.2.2/m/pkg/private/load_packages.m
/usr/share/octave/4.2.2/m/pkg/private/load_packages_and_dependencies.m
/usr/share/octave/4.2.2/m/pkg/private/rebuild.m
/usr/share/octave/4.2.2/m/pkg/private/save_order.m
/usr/share/octave/4.2.2/m/pkg/private/uninstall.m
/usr/share/octave/4.2.2/m/pkg/private/unload_packages.m