/usr/include/dune/geometry/ is in libdune-geometry-dev 2.4.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dune/geometry/affinegeometry.hh
/usr/include/dune/geometry/axisalignedcubegeometry.hh
/usr/include/dune/geometry/dimension.hh
/usr/include/dune/geometry/generalvertexorder.hh
/usr/include/dune/geometry/genericgeometry/
/usr/include/dune/geometry/genericgeometry/codimtable.hh
/usr/include/dune/geometry/genericgeometry/conversion.hh
/usr/include/dune/geometry/genericgeometry/geometrytraits.hh
/usr/include/dune/geometry/genericgeometry/matrixhelper.hh
/usr/include/dune/geometry/genericgeometry/referencedomain.hh
/usr/include/dune/geometry/genericgeometry/referenceelements.hh
/usr/include/dune/geometry/genericgeometry/subtopologies.hh
/usr/include/dune/geometry/genericgeometry/topologytypes.hh
/usr/include/dune/geometry/multilineargeometry.hh
/usr/include/dune/geometry/quadraturerules/
/usr/include/dune/geometry/quadraturerules.hh
/usr/include/dune/geometry/quadraturerules/compositequadraturerule.hh
/usr/include/dune/geometry/quadraturerules/gauss_imp.hh
/usr/include/dune/geometry/quadraturerules/gausslobatto_imp.hh
/usr/include/dune/geometry/quadraturerules/jacobi_1_0_imp.hh
/usr/include/dune/geometry/quadraturerules/jacobi_2_0_imp.hh
/usr/include/dune/geometry/quadraturerules/nocopyvector.hh
/usr/include/dune/geometry/quadraturerules/pointquadrature.hh
/usr/include/dune/geometry/quadraturerules/simplexquadrature.hh
/usr/include/dune/geometry/quadraturerules/tensorproductquadrature.hh
/usr/include/dune/geometry/referenceelements.hh
/usr/include/dune/geometry/refinement/
/usr/include/dune/geometry/refinement.hh
/usr/include/dune/geometry/refinement/base.cc
/usr/include/dune/geometry/refinement/hcube.cc
/usr/include/dune/geometry/refinement/hcubetriangulation.cc
/usr/include/dune/geometry/refinement/prismtriangulation.cc
/usr/include/dune/geometry/refinement/pyramidtriangulation.cc
/usr/include/dune/geometry/refinement/simplex.cc
/usr/include/dune/geometry/test/
/usr/include/dune/geometry/test/checkgeometry.hh
/usr/include/dune/geometry/topologyfactory.hh
/usr/include/dune/geometry/type.hh
/usr/include/dune/geometry/typeindex.hh
/usr/include/dune/geometry/virtualrefinement.cc
/usr/include/dune/geometry/virtualrefinement.hh