/usr/ is in libido-0.1-dev 12.10.0.1-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libido-0.1.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libido-0.1-dev/
/usr/share/doc/libido-0.1-dev/copyright
/usr/include/
/usr/include/libido-0.1/
/usr/include/libido-0.1/libido/
/usr/include/libido-0.1/libido/idotimeline.h
/usr/include/libido-0.1/libido/idoscalemenuitem.h
/usr/include/libido-0.1/libido/idocalendarmenuitem.h
/usr/include/libido-0.1/libido/libido.h
/usr/include/libido-0.1/libido/idomessagedialog.h
/usr/include/libido-0.1/libido/idoentrymenuitem.h
/usr/include/libido-0.1/libido/idorange.h
/usr/lib/x86_64-linux-gnu/libido-0.1.so
/usr/share/doc/libido-0.1-dev/changelog.Debian.gz