/usr/lib/ruby/vendor_ruby/ is in vagrant-digitalocean 0.9.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/check_state.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/create.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/destroy.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/modify_provision_path.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/power_off.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/power_on.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/rebuild.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/reload.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/setup_key.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/setup_sudo.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/setup_user.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/actions/shut_down.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/commands/
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/commands/list.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/commands/rebuild.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/config.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/errors.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/helpers/
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/helpers/client.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/helpers/result.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/plugin.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/provider.rb
/usr/lib/ruby/vendor_ruby/vagrant-digitalocean/version.rb