/usr/lib/ruby/ is in vagrant-cachier 1.2.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/action/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/action/clean.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/action/configure_bucket_root.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/action/install_buckets.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/apt.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/apt_cacher.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/apt_lists.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/bower.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/chef.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/chef_gem.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/composer.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/gem.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/generic.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/npm.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/pacman.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/rvm.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/yum.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket/zypper.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/bucket.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/arch/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/arch/pacman_cache_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/debian/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/debian/apt_cache_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/debian/apt_cacher_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/debian/apt_lists_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/bower_path.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/chef_file_cache_path.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/chef_gemdir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/composer_path.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/gemdir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/npm_cache_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/linux/rvm_path.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/redhat/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/redhat/yum_cache_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/suse/
/usr/lib/ruby/vendor_ruby/vagrant-cachier/cap/suse/zypper_cache_dir.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/capabilities.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/config.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/hooks.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/plugin.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier/version.rb
/usr/lib/ruby/vendor_ruby/vagrant-cachier.rb