/usr/ is in librelion+mpi+gui-dev 1.4+dfsg-3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/relion-1.4/
/usr/include/relion-1.4/src/
/usr/include/relion-1.4/src/autopicker_mpi.h
/usr/include/relion-1.4/src/ctffind_runner_mpi.h
/usr/include/relion-1.4/src/manualpicker.h
/usr/include/relion-1.4/src/ml_optimiser_mpi.h
/usr/include/relion-1.4/src/mpi.h
/usr/include/relion-1.4/src/particle_polisher_mpi.h
/usr/include/relion-1.4/src/particle_sorter_mpi.h
/usr/include/relion-1.4/src/preprocessing_mpi.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/librelion-1.4.a
/usr/lib/x86_64-linux-gnu/librelion-1.4.la
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/relion-1.4.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/librelion+mpi+gui-dev/
/usr/share/doc/librelion+mpi+gui-dev/copyright
/usr/lib/x86_64-linux-gnu/librelion-1.4.so
/usr/share/doc/librelion+mpi+gui-dev/changelog.Debian.gz