/usr/ is in ruby-net-ssh-multi 1.2.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/net/
/usr/lib/ruby/vendor_ruby/net/ssh/
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/net/ssh/multi.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/
/usr/lib/ruby/vendor_ruby/net/ssh/multi/version.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/session_actions.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/channel_proxy.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/session.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/channel.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/pending_connection.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/server_list.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/dynamic_server.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/subsession.rb
/usr/lib/ruby/vendor_ruby/net/ssh/multi/server.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-net-ssh-multi/
/usr/share/doc/ruby-net-ssh-multi/copyright
/usr/share/doc/ruby-net-ssh-multi/README.rdoc
/usr/share/doc/ruby-net-ssh-multi/changelog.gz
/usr/share/doc/ruby-net-ssh-multi/changelog.Debian.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/net-ssh-multi-1.2.1.gemspec