/usr/share/dune/ is in libdune-pdelab-dev 2.0.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dune-pdelab/config.h.cmake
/usr/share/dune/aclocal/
/usr/share/dune/aclocal/dune-pdelab.m4
/usr/share/dune/aclocal/dune-posix-clock.m4
/usr/share/dune/aclocal/dune-unordered-containers.m4
/usr/share/dune/aclocal/eigen.m4
/usr/share/dune/aclocal/petsc.m4
/usr/share/dune/cmake/
/usr/share/dune/cmake/modules/
/usr/share/dune/cmake/modules/DunePdelabMacros.cmake
/usr/share/dune/cmake/modules/FindCXXUnorderedContainers.cmake
/usr/share/dune/cmake/modules/FindPETSc.cmake
/usr/share/dune/cmake/modules/FindPackageMultipass.cmake
/usr/share/dune/cmake/modules/ResolveCompilerPaths.cmake
/usr/share/dune/cmake/modules/UsePETSc.cmake