/usr/lib/ruby/ is in vagrant-lxc 1.2.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/vagrant-lxc/
/usr/lib/ruby/vendor_ruby/vagrant-lxc.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/boot.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/clear_forwarded_ports.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/compress_rootfs.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/create.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/destroy.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/destroy_confirm.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/fetch_ip_from_dnsmasq_leases.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/fetch_ip_with_lxc_attach.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/forced_halt.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/forward_ports.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/gc_private_network_bridges.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/handle_box_metadata.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/prepare_nfs_settings.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/prepare_nfs_valid_ids.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/private_networks.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/setup_package_files.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/action/warn_networks.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/command/
/usr/lib/ruby/vendor_ruby/vagrant-lxc/command/root.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/command/sudoers.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/config.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/driver/
/usr/lib/ruby/vendor_ruby/vagrant-lxc/driver.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/driver/cli.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/errors.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/plugin.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/provider/
/usr/lib/ruby/vendor_ruby/vagrant-lxc/provider.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/provider/cap/
/usr/lib/ruby/vendor_ruby/vagrant-lxc/provider/cap/public_address.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/sudo_wrapper.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/synced_folder.rb
/usr/lib/ruby/vendor_ruby/vagrant-lxc/version.rb