/usr/ is in libscalapack-mpich-dev 2.0.2-4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/cmake/
/usr/lib/cmake/scalapack-2.0.2.mpich/
/usr/lib/cmake/scalapack-2.0.2.mpich/scalapack-config-version.cmake
/usr/lib/cmake/scalapack-2.0.2.mpich/scalapack-config.cmake
/usr/lib/cmake/scalapack-2.0.2.mpich/scalapack-targets-none.cmake
/usr/lib/cmake/scalapack-2.0.2.mpich/scalapack-targets.cmake
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/scalapack-mpich.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libscalapack-mpich-dev/
/usr/share/doc/libscalapack-mpich-dev/README.gz
/usr/share/doc/libscalapack-mpich-dev/copyright
/usr/lib/x86_64-linux-gnu/libscalapack-mpich.so
/usr/share/doc/libscalapack-mpich-dev/changelog.Debian.gz