/usr/share/ is in libdune-grid-dev 2.4.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dune/
/usr/share/dune/aclocal/
/usr/share/dune-grid/
/usr/share/dune-grid/config.h.cmake
/usr/share/dune/aclocal/psurface.m4
/usr/share/dune/aclocal/dune_gridtype.m4
/usr/share/dune/aclocal/dune_grid.m4
/usr/share/dune/aclocal/grape.m4
/usr/share/dune/aclocal/dune_extra_utils.m4
/usr/share/dune/aclocal/amiramesh.m4
/usr/share/dune/aclocal/alberta.m4
/usr/share/dune/aclocal/alugrid.m4
/usr/share/dune/aclocal/dune_experimental_grid_extensions.m4
/usr/share/dune/aclocal/ug.m4
/usr/share/dune/aclocal/dune_griddim.m4
/usr/share/dune/cmake/
/usr/share/dune/cmake/modules/
/usr/share/dune/cmake/modules/GridType.cmake
/usr/share/dune/cmake/modules/DuneGridMacros.cmake
/usr/share/dune/cmake/modules/FindAmiraMesh.cmake
/usr/share/dune/cmake/modules/FindGrape.cmake
/usr/share/dune/cmake/modules/AddALUGridFlags.cmake
/usr/share/dune/cmake/modules/AddGrapeFlags.cmake
/usr/share/dune/cmake/modules/AddAlbertaFlags.cmake
/usr/share/dune/cmake/modules/AddAmiraMeshFlags.cmake
/usr/share/dune/cmake/modules/CheckExperimentalGridExtensions.cmake
/usr/share/dune/cmake/modules/AddPsurfaceFlags.cmake
/usr/share/dune/cmake/modules/FindPsurface.cmake
/usr/share/dune/cmake/modules/UseUG.cmake
/usr/share/dune/cmake/modules/FindAlberta.cmake
/usr/share/dune/cmake/modules/FindALUGrid.cmake
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/libdune-grid-dev
/usr/share/doc/
/usr/share/doc/libdune-grid-dev/
/usr/share/doc/libdune-grid-dev/copyright
/usr/share/doc/libdune-grid-dev/changelog.Debian.gz