/usr/ is in python-rostopic 1.13.5+ds1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/
/usr/bin/rostopic
/usr/lib/
/usr/lib/python2.7/
/usr/lib/python2.7/dist-packages/
/usr/lib/python2.7/dist-packages/rostopic/
/usr/lib/python2.7/dist-packages/rostopic/__init__.py
/usr/lib/rostopic/
/usr/lib/rostopic/rostopic
/usr/share/
/usr/share/doc/
/usr/share/doc/python-rostopic/
/usr/share/doc/python-rostopic/copyright
/usr/share/rostopic/
/usr/share/rostopic/cmake/
/usr/share/rostopic/cmake/rostopicConfig-version.cmake
/usr/share/rostopic/cmake/rostopicConfig.cmake
/usr/share/rostopic/package.xml
/usr/share/doc/python-rostopic/changelog.Debian.gz