/usr/include/dune/grid/albertagrid/ is in libdune-grid-dev 2.4.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dune/grid/albertagrid/agrid.hh
/usr/include/dune/grid/albertagrid/albertagrid.cc
/usr/include/dune/grid/albertagrid/albertaheader.hh
/usr/include/dune/grid/albertagrid/albertareader.hh
/usr/include/dune/grid/albertagrid/algebra.hh
/usr/include/dune/grid/albertagrid/backuprestore.hh
/usr/include/dune/grid/albertagrid/capabilities.hh
/usr/include/dune/grid/albertagrid/coordcache.hh
/usr/include/dune/grid/albertagrid/datahandle.hh
/usr/include/dune/grid/albertagrid/dgfparser.hh
/usr/include/dune/grid/albertagrid/dofadmin.hh
/usr/include/dune/grid/albertagrid/dofvector.hh
/usr/include/dune/grid/albertagrid/elementinfo.hh
/usr/include/dune/grid/albertagrid/entity.cc
/usr/include/dune/grid/albertagrid/entity.hh
/usr/include/dune/grid/albertagrid/entitypointer.hh
/usr/include/dune/grid/albertagrid/entityseed.hh
/usr/include/dune/grid/albertagrid/geometry.cc
/usr/include/dune/grid/albertagrid/geometry.hh
/usr/include/dune/grid/albertagrid/geometrycache.hh
/usr/include/dune/grid/albertagrid/geometryreference.hh
/usr/include/dune/grid/albertagrid/gridfactory.hh
/usr/include/dune/grid/albertagrid/gridfamily.hh
/usr/include/dune/grid/albertagrid/gridview.hh
/usr/include/dune/grid/albertagrid/hierarchiciterator.hh
/usr/include/dune/grid/albertagrid/indexsets.hh
/usr/include/dune/grid/albertagrid/indexstack.hh
/usr/include/dune/grid/albertagrid/intersection.cc
/usr/include/dune/grid/albertagrid/intersection.hh
/usr/include/dune/grid/albertagrid/intersectioniterator.hh
/usr/include/dune/grid/albertagrid/leafiterator.hh
/usr/include/dune/grid/albertagrid/level.hh
/usr/include/dune/grid/albertagrid/leveliterator.hh
/usr/include/dune/grid/albertagrid/macrodata.hh
/usr/include/dune/grid/albertagrid/macroelement.hh
/usr/include/dune/grid/albertagrid/meshpointer.hh
/usr/include/dune/grid/albertagrid/misc.hh
/usr/include/dune/grid/albertagrid/persistentcontainer.hh
/usr/include/dune/grid/albertagrid/projection.hh
/usr/include/dune/grid/albertagrid/refinement.hh
/usr/include/dune/grid/albertagrid/transformation.hh
/usr/include/dune/grid/albertagrid/treeiterator.hh
/usr/include/dune/grid/albertagrid/undefine-2.0.hh
/usr/include/dune/grid/albertagrid/undefine-3.0.hh