/usr/ is in python-flake8 2.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/
/usr/bin/flake8
/usr/lib/
/usr/lib/python2.7/
/usr/lib/python2.7/dist-packages/
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/requires.txt
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/PKG-INFO
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/entry_points.txt
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/dependency_links.txt
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/top_level.txt
/usr/lib/python2.7/dist-packages/flake8-2.1.0.egg-info/SOURCES.txt
/usr/lib/python2.7/dist-packages/flake8/
/usr/lib/python2.7/dist-packages/flake8/main.py
/usr/lib/python2.7/dist-packages/flake8/run.py
/usr/lib/python2.7/dist-packages/flake8/util.py
/usr/lib/python2.7/dist-packages/flake8/hooks.py
/usr/lib/python2.7/dist-packages/flake8/__init__.py
/usr/lib/python2.7/dist-packages/flake8/engine.py
/usr/lib/python2.7/dist-packages/flake8/_pyflakes.py
/usr/lib/python2.7/dist-packages/flake8/tests/
/usr/lib/python2.7/dist-packages/flake8/tests/test_engine.py
/usr/lib/python2.7/dist-packages/flake8/tests/__init__.py
/usr/share/
/usr/share/doc/
/usr/share/doc/python-flake8/
/usr/share/doc/python-flake8/copyright
/usr/share/doc/python-flake8/changelog.Debian.gz
/usr/share/doc/python-flake8/README.rst
/usr/share/doc/python-flake8/CONTRIBUTORS.txt
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/flake8.1.gz