# File lib/openshift-origin-node/model/unix_user.rb, line 699
    def write_ssh_keys(authorized_keys_file, keys)
      File.open(authorized_keys_file,
                File::WRONLY|File::TRUNC|File::CREAT,
                0o0440) do |file|
        file.write(keys.values.join("\n"))
        file.write("\n")
      end
      FileUtils.chown_R('root', @uuid, authorized_keys_file)
      set_selinux_context(authorized_keys_file)

      keys
    end