/usr/include/trilinos/ is in libtrilinos-isorropia-dev 12.12.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/trilinos/Isorropia_Colorer.hpp
/usr/include/trilinos/Isorropia_ConfigDefs.hpp
/usr/include/trilinos/Isorropia_CostDescriber.hpp
/usr/include/trilinos/Isorropia_Epetra.hpp
/usr/include/trilinos/Isorropia_EpetraColorer.hpp
/usr/include/trilinos/Isorropia_EpetraCostDescriber.hpp
/usr/include/trilinos/Isorropia_EpetraLevelScheduler.hpp
/usr/include/trilinos/Isorropia_EpetraLibrary.hpp
/usr/include/trilinos/Isorropia_EpetraMatcher.hpp
/usr/include/trilinos/Isorropia_EpetraOperator.hpp
/usr/include/trilinos/Isorropia_EpetraOrderer.hpp
/usr/include/trilinos/Isorropia_EpetraPartitioner.hpp
/usr/include/trilinos/Isorropia_EpetraProber.hpp
/usr/include/trilinos/Isorropia_EpetraRedistributor.hpp
/usr/include/trilinos/Isorropia_EpetraZoltanLib.hpp
/usr/include/trilinos/Isorropia_Exception.hpp
/usr/include/trilinos/Isorropia_LevelScheduler.hpp
/usr/include/trilinos/Isorropia_Operator.hpp
/usr/include/trilinos/Isorropia_Orderer.hpp
/usr/include/trilinos/Isorropia_Partitioner.hpp
/usr/include/trilinos/Isorropia_Redistributor.hpp
/usr/include/trilinos/Isorropia_Utils.hpp
/usr/include/trilinos/Isorropia_Version.hpp
/usr/include/trilinos/Isorropia_config.h
/usr/include/trilinos/QueryObject.hpp