/usr/share/proton-0.14.0/examples/ruby/ is in libqpid-proton8-dev-examples 0.14.0-5.1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/proton-0.14.0/examples/ruby/engine_recv.rb
/usr/share/proton-0.14.0/examples/ruby/engine_send.rb
/usr/share/proton-0.14.0/examples/ruby/example_test.rb
/usr/share/proton-0.14.0/examples/ruby/lib/
/usr/share/proton-0.14.0/examples/ruby/lib/debugging.rb
/usr/share/proton-0.14.0/examples/ruby/lib/driver.rb
/usr/share/proton-0.14.0/examples/ruby/lib/qpid_examples.rb
/usr/share/proton-0.14.0/examples/ruby/lib/selectable.rb
/usr/share/proton-0.14.0/examples/ruby/lib/send_and_receive.rb
/usr/share/proton-0.14.0/examples/ruby/messenger/
/usr/share/proton-0.14.0/examples/ruby/messenger/README.md
/usr/share/proton-0.14.0/examples/ruby/messenger/client.rb
/usr/share/proton-0.14.0/examples/ruby/messenger/mailserver.rb
/usr/share/proton-0.14.0/examples/ruby/messenger/nonblocking_recv.rb
/usr/share/proton-0.14.0/examples/ruby/messenger/recv.rb
/usr/share/proton-0.14.0/examples/ruby/messenger/send.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/
/usr/share/proton-0.14.0/examples/ruby/reactor/README.md
/usr/share/proton-0.14.0/examples/ruby/reactor/broker.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/client.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/direct_recv.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/direct_send.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/helloworld.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/helloworld_direct.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/server.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/simple_recv.rb
/usr/share/proton-0.14.0/examples/ruby/reactor/simple_send.rb
/usr/share/proton-0.14.0/examples/ruby/registry_test.rb
/usr/share/proton-0.14.0/examples/ruby/wrapper_test.rb