/usr/lib/ruby/ is in ruby-vmc 0.3.10-0ubuntu10.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/vmc/
/usr/lib/ruby/vendor_ruby/vmc/client.rb
/usr/lib/ruby/vendor_ruby/vmc/const.rb
/usr/lib/ruby/vendor_ruby/cli.rb
/usr/lib/ruby/vendor_ruby/vmc.rb
/usr/lib/ruby/vendor_ruby/cli/
/usr/lib/ruby/vendor_ruby/cli/zip_util.rb
/usr/lib/ruby/vendor_ruby/cli/frameworks.rb
/usr/lib/ruby/vendor_ruby/cli/usage.rb
/usr/lib/ruby/vendor_ruby/cli/config.rb
/usr/lib/ruby/vendor_ruby/cli/commands/
/usr/lib/ruby/vendor_ruby/cli/commands/admin.rb
/usr/lib/ruby/vendor_ruby/cli/commands/user.rb
/usr/lib/ruby/vendor_ruby/cli/commands/apps.rb
/usr/lib/ruby/vendor_ruby/cli/commands/misc.rb
/usr/lib/ruby/vendor_ruby/cli/commands/base.rb
/usr/lib/ruby/vendor_ruby/cli/commands/services.rb
/usr/lib/ruby/vendor_ruby/cli/runner.rb
/usr/lib/ruby/vendor_ruby/cli/services_helper.rb
/usr/lib/ruby/vendor_ruby/cli/version.rb
/usr/lib/ruby/vendor_ruby/cli/errors.rb
/usr/lib/ruby/vendor_ruby/cli/core_ext.rb