/usr/ is in libtrilinos-pliris-dev 12.12.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/trilinos/
/usr/include/trilinos/BLAS_prototypes.h
/usr/include/trilinos/Pliris.h
/usr/include/trilinos/PlirisVersion.h
/usr/include/trilinos/Pliris_ConfigDefs.h
/usr/include/trilinos/Pliris_config.h
/usr/include/trilinos/block.h
/usr/include/trilinos/cblassp.h
/usr/include/trilinos/dblassp.h
/usr/include/trilinos/defines.h
/usr/include/trilinos/distribute.h
/usr/include/trilinos/exchange_pivots.h
/usr/include/trilinos/extern_vars.h
/usr/include/trilinos/factor.h
/usr/include/trilinos/forward.h
/usr/include/trilinos/forwardall.h
/usr/include/trilinos/macros.h
/usr/include/trilinos/mytime.h
/usr/include/trilinos/pcomm.h
/usr/include/trilinos/perm1.h
/usr/include/trilinos/permute.h
/usr/include/trilinos/permute_mat.h
/usr/include/trilinos/permute_rhs.h
/usr/include/trilinos/sblassp.h
/usr/include/trilinos/solve.h
/usr/include/trilinos/vars.h
/usr/include/trilinos/x_factor.h
/usr/include/trilinos/x_solve.h
/usr/include/trilinos/xlu_solve.h
/usr/include/trilinos/zblassp.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Pliris/
/usr/lib/x86_64-linux-gnu/cmake/Pliris/PlirisConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Pliris/PlirisTargets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/Pliris/PlirisTargets.cmake
/usr/share/
/usr/share/doc/
/usr/share/doc/libtrilinos-pliris-dev/
/usr/share/doc/libtrilinos-pliris-dev/copyright
/usr/lib/x86_64-linux-gnu/libtrilinos_dpliris.so
/usr/share/doc/libtrilinos-pliris-dev/changelog.Debian.gz