/usr/lib/ is in libtrilinos-tpetra-dev 12.4.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/TpetraCore/
/usr/lib/x86_64-linux-gnu/cmake/TpetraCore/TpetraCoreConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraCore/TpetraCoreTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraCore/TpetraCoreTargets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/Tpetra/
/usr/lib/x86_64-linux-gnu/cmake/Tpetra/TpetraConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraClassic/
/usr/lib/x86_64-linux-gnu/cmake/TpetraClassic/TpetraClassicConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraClassic/TpetraClassicTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraClassic/TpetraClassicTargets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraTSQR/
/usr/lib/x86_64-linux-gnu/cmake/TpetraTSQR/TpetraTSQRTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraTSQR/TpetraTSQRTargets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraTSQR/TpetraTSQRConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraKernels/
/usr/lib/x86_64-linux-gnu/cmake/TpetraKernels/TpetraKernelsTargets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraKernels/TpetraKernelsConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/TpetraKernels/TpetraKernelsTargets.cmake
/usr/lib/x86_64-linux-gnu/libtrilinos_kokkostsqr.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetra.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetrakernels.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraclassiclinalg.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraext.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraclassicnodeapi.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetrainout.so
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraclassic.so