/usr/share/ is in libdeal.ii-dev 8.1.0-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libdeal.ii-dev/
/usr/share/doc/libdeal.ii-dev/changelog.Debian.gz
/usr/share/doc/libdeal.ii-dev/copyright
/usr/share/cmake/
/usr/share/cmake/deal.II/
/usr/share/cmake/deal.II/deal.IITargets.cmake
/usr/share/cmake/deal.II/deal.IITargets-debugrelease.cmake
/usr/share/cmake/deal.II/deal.IIConfig.cmake
/usr/share/cmake/deal.II/deal.IIConfigVersion.cmake
/usr/share/deal.ii/
/usr/share/deal.ii/cmake/
/usr/share/deal.ii/cmake/macros/
/usr/share/deal.ii/cmake/macros/macro_deal_ii_initialize_cached_variables.cmake
/usr/share/deal.ii/cmake/macros/macro_deal_ii_invoke_autopilot.cmake
/usr/share/deal.ii/cmake/macros/macro_deal_ii_setup_target.cmake