/usr/ is in ruby-public-suffix 2.0.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/ruby-public-suffix/
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-public-suffix/README.md.gz
/usr/share/doc/ruby-public-suffix/changelog.Debian.gz
/usr/share/doc/ruby-public-suffix/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/gems/
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/data/
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/data/list.txt
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix/
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix/domain.rb
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix/errors.rb
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix/list.rb
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix/rule.rb
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix/version.rb
/usr/share/rubygems-integration/all/gems/public_suffix-2.0.5/lib/public_suffix.rb
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/public_suffix-2.0.5.gemspec