/usr/ is in ruby-hiredis 0.6.1-1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/hiredis/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/hiredis/ext/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/hiredis/ext/hiredis_ext.so
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/hiredis/
/usr/lib/ruby/vendor_ruby/hiredis/connection.rb
/usr/lib/ruby/vendor_ruby/hiredis/reader.rb
/usr/lib/ruby/vendor_ruby/hiredis/version.rb
/usr/lib/ruby/vendor_ruby/hiredis/ruby/
/usr/lib/ruby/vendor_ruby/hiredis/ruby/connection.rb
/usr/lib/ruby/vendor_ruby/hiredis/ruby/reader.rb
/usr/lib/ruby/vendor_ruby/hiredis/ext/
/usr/lib/ruby/vendor_ruby/hiredis/ext/connection.rb
/usr/lib/ruby/vendor_ruby/hiredis/ext/reader.rb
/usr/lib/ruby/vendor_ruby/hiredis.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/2.3.0/
/usr/share/rubygems-integration/2.3.0/specifications/
/usr/share/rubygems-integration/2.3.0/specifications/hiredis-0.6.1.gemspec
/usr/share/doc/
/usr/share/doc/ruby-hiredis/
/usr/share/doc/ruby-hiredis/examples/
/usr/share/doc/ruby-hiredis/examples/em.rb
/usr/share/doc/ruby-hiredis/copyright
/usr/share/doc/ruby-hiredis/changelog.Debian.gz
/usr/share/doc/ruby-hiredis/README.md.gz