/usr/ is in libownet-dev 3.1p1-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/include/
/usr/include/ownetapi.h
/usr/share/doc/
/usr/share/doc/libowfs-dev/
/usr/share/doc/libowfs-dev/examples/
/usr/share/doc/libowfs-dev/examples/ownet/
/usr/share/doc/libowfs-dev/examples/ownet/Makefile
/usr/share/doc/libowfs-dev/examples/ownet/ownetexample.c
/usr/share/doc/libownet-dev/
/usr/share/doc/libownet-dev/copyright
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/ownet.1.gz
/usr/lib/x86_64-linux-gnu/libownet.so
/usr/share/doc/libownet-dev/changelog.Debian.gz
/usr/share/man/man1/libownet.1.gz
/usr/share/man/man1/ownetapi.1.gz
/usr/share/man/man1/ownetlib.1.gz