/usr/ is in ruby-rack-piwik 0.2.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/rack/
/usr/lib/ruby/vendor_ruby/rack/piwik.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-rack-piwik/
/usr/share/doc/ruby-rack-piwik/copyright
/usr/share/doc/ruby-rack-piwik/README.md
/usr/share/doc/ruby-rack-piwik/changelog.Debian.gz
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/ruby-rack-piwik
/usr/share/ruby-rack-piwik/
/usr/share/ruby-rack-piwik/templates/
/usr/share/ruby-rack-piwik/templates/async.erb
/usr/share/ruby-rack-piwik/templates/sync.erb
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/rack-piwik-0.2.2.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/rack-piwik-0.2.2.gemspec