/usr/ is in ruby-echoe 4.6.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/
/usr/share/
/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/echoe-4.6.5.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/echoe-4.6.5.gemspec
/usr/share/doc/
/usr/share/doc/ruby-echoe/
/usr/share/doc/ruby-echoe/README.rdoc
/usr/share/doc/ruby-echoe/copyright
/usr/share/doc/ruby-echoe/changelog.Debian.gz
/usr/lib/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/echoe/
/usr/lib/ruby/vendor_ruby/echoe/rubygems.rb
/usr/lib/ruby/vendor_ruby/echoe/extensions.rb
/usr/lib/ruby/vendor_ruby/echoe/platform.rb
/usr/lib/ruby/vendor_ruby/echoe.rb