/usr/include/dune/pdelab/finiteelement/ is in libdune-pdelab-dev 2.5.0~rc1-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dune/pdelab/finiteelement/l2orthonormal.hh
/usr/include/dune/pdelab/finiteelement/localbasiscache.hh
/usr/include/dune/pdelab/finiteelement/pk1d.hh
/usr/include/dune/pdelab/finiteelement/qkdglagrange.hh
/usr/include/dune/pdelab/finiteelement/qkdglegendre.hh
/usr/include/dune/pdelab/finiteelement/qkdglobatto.hh
/usr/include/dune/pdelab/finiteelementmap/bdm1cube2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/bdm1simplex2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/brezzidouglasmarinifem.hh
/usr/include/dune/pdelab/finiteelementmap/edges0.5fem.hh
/usr/include/dune/pdelab/finiteelementmap/finiteelementmap.hh
/usr/include/dune/pdelab/finiteelementmap/global.hh
/usr/include/dune/pdelab/finiteelementmap/mimeticfem.hh
/usr/include/dune/pdelab/finiteelementmap/monomfem.hh
/usr/include/dune/pdelab/finiteelementmap/opbfem.hh
/usr/include/dune/pdelab/finiteelementmap/p0fem.hh
/usr/include/dune/pdelab/finiteelementmap/pk1d.hh
/usr/include/dune/pdelab/finiteelementmap/pkfem.hh
/usr/include/dune/pdelab/finiteelementmap/pkqkfem.hh
/usr/include/dune/pdelab/finiteelementmap/powerfem.hh
/usr/include/dune/pdelab/finiteelementmap/qkdg.hh
/usr/include/dune/pdelab/finiteelementmap/qkdggl.hh
/usr/include/dune/pdelab/finiteelementmap/qkfem.hh
/usr/include/dune/pdelab/finiteelementmap/rannacherturekfem.hh
/usr/include/dune/pdelab/finiteelementmap/raviartthomasfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt0cube2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt0cube3dfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt0simplex2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt1cube2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt1cube3dfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt1simplex2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/rt2cube2dfem.hh
/usr/include/dune/pdelab/finiteelementmap/variablemonomfem.hh
/usr/include/dune/pdelab/finiteelementmap/variableopbfem.hh
/usr/include/dune/pdelab/finiteelementmap/variableqkdgfem.hh