/usr/include/mlpack/core/util/ is in libmlpack-dev 1.0.10-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/mlpack/core/util/arma_traits.hpp
/usr/include/mlpack/core/util/cli.hpp
/usr/include/mlpack/core/util/cli_deleter.hpp
/usr/include/mlpack/core/util/cli_impl.hpp
/usr/include/mlpack/core/util/log.hpp
/usr/include/mlpack/core/util/nulloutstream.hpp
/usr/include/mlpack/core/util/option.hpp
/usr/include/mlpack/core/util/option_impl.hpp
/usr/include/mlpack/core/util/prefixedoutstream.hpp
/usr/include/mlpack/core/util/prefixedoutstream_impl.hpp
/usr/include/mlpack/core/util/save_restore_utility.hpp
/usr/include/mlpack/core/util/save_restore_utility_impl.hpp
/usr/include/mlpack/core/util/sfinae_utility.hpp
/usr/include/mlpack/core/util/string_util.hpp
/usr/include/mlpack/core/util/timers.hpp
/usr/include/mlpack/core/util/version.hpp