/usr/ is in hud 14.10+17.10.20170619-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/hud/hud-service
/usr/lib/
/usr/lib/systemd/
/usr/lib/systemd/user/
/usr/lib/systemd/user/hud.service
/usr/lib/systemd/user/unity-session.target.wants/
/usr/lib/systemd/user/window-stack-bridge.service
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/hud/
/usr/lib/x86_64-linux-gnu/hud/window-stack-bridge
/usr/share/
/usr/share/apport/
/usr/share/apport/package-hooks/
/usr/share/apport/package-hooks/source_hud.py
/usr/share/dbus-1/
/usr/share/dbus-1/interfaces/
/usr/share/dbus-1/interfaces/com.canonical.hud.query.xml
/usr/share/dbus-1/interfaces/com.canonical.hud.xml
/usr/share/dbus-1/services/
/usr/share/dbus-1/services/com.canonical.hud.service
/usr/share/doc/
/usr/share/doc/hud/
/usr/share/doc/hud/changelog.Debian.gz
/usr/share/doc/hud/copyright
/usr/share/glib-2.0/
/usr/share/glib-2.0/schemas/
/usr/share/glib-2.0/schemas/com.canonical.indicator.appmenu.hud.gschema.xml
/usr/share/glib-2.0/schemas/com.canonical.indicator.appmenu.hud.search.gschema.xml
/usr/lib/systemd/user/unity-session.target.wants/window-stack-bridge.service