/usr/ is in libkface-dev 1.0~digikam3.5.0-0ubuntu10.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/libkface/
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/libkface.pc
/usr/include/libkface/libkface_export.h
/usr/include/libkface/dataproviders.h
/usr/include/libkface/version.h
/usr/include/libkface/identity.h
/usr/include/libkface/facedetector.h
/usr/include/libkface/recognitiondatabase.h
/usr/share/
/usr/share/kde4/
/usr/share/kde4/apps/
/usr/share/kde4/apps/cmake/
/usr/share/kde4/apps/cmake/modules/
/usr/share/kde4/apps/cmake/modules/FindKface.cmake
/usr/share/doc/
/usr/share/doc/libkface-dev/
/usr/share/doc/libkface-dev/copyright
/usr/lib/libkface.so
/usr/share/doc/libkface-dev/changelog.Debian.gz