/usr/ is in libqt5x11extras5-dev 5.9.5-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/qt5/
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/include/
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/QX11Info
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/QtX11Extras
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/QtX11ExtrasDepends
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/QtX11ExtrasVersion
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/qtx11extrasglobal.h
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/qtx11extrasversion.h
/usr/include/x86_64-linux-gnu/qt5/QtX11Extras/qx11info_x11.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Qt5X11Extras/
/usr/lib/x86_64-linux-gnu/cmake/Qt5X11Extras/Qt5X11ExtrasConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5X11Extras/Qt5X11ExtrasConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/libQt5X11Extras.prl
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5X11Extras.pc
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_x11extras.pri
/usr/share/
/usr/share/doc/
/usr/share/doc/libqt5x11extras5-dev/
/usr/share/doc/libqt5x11extras5-dev/copyright
/usr/lib/x86_64-linux-gnu/libQt5X11Extras.so
/usr/share/doc/libqt5x11extras5-dev/changelog.Debian.gz