/usr/ is in libroot-math-quadp-dev 5.34.30-0ubuntu8.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/include/
/usr/include/root/
/usr/include/root/TQpLinSolverSparse.h
/usr/include/root/TQpSolverBase.h
/usr/include/root/TQpResidual.h
/usr/include/root/TQpProbSparse.h
/usr/include/root/TQpVar.h
/usr/lib/
/usr/include/root/TQpProbBase.h
/usr/include/root/TQpDataSparse.h
/usr/include/root/TQpLinSolverDens.h
/usr/include/root/TQpDataBase.h
/usr/include/root/TQpProbDens.h
/usr/include/root/TMehrotraSolver.h
/usr/include/root/TQpLinSolverBase.h
/usr/include/root/TQpDataDens.h
/usr/include/root/TGondzioSolver.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libroot-math-quadp-dev/
/usr/share/doc/libroot-math-quadp-dev/copyright
/usr/lib/x86_64-linux-gnu/libQuadp.so
/usr/share/doc/libroot-math-quadp-dev/changelog.Debian.gz