/usr/ is in libunique-dev 1.1.6-4ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libunique-dev/
/usr/lib/
/usr/lib/libunique-1.0.a
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/unique-1.0.pc
/usr/include/
/usr/include/unique-1.0/
/usr/include/unique-1.0/unique/
/usr/include/unique-1.0/unique/uniquebackend.h
/usr/include/unique-1.0/unique/unique.h
/usr/include/unique-1.0/unique/uniquemessage.h
/usr/include/unique-1.0/unique/uniqueenumtypes.h
/usr/include/unique-1.0/unique/uniqueversion.h
/usr/include/unique-1.0/unique/uniqueapp.h
/usr/share/
/usr/share/doc/libunique-dev/copyright
/usr/lib/libunique-1.0.so
/usr/share/doc/libunique-dev/README
/usr/share/doc/libunique-dev/NEWS.gz
/usr/share/doc/libunique-dev/AUTHORS
/usr/share/doc/libunique-dev/changelog.Debian.gz