Gets the index of news crawl files from commoncrawl.org and returns an array of names
        :return:

def __get_remote_index(self):
        """
        Gets the index of news crawl files from commoncrawl.org and returns an array of names
        :return:
        """
        # cleanup
        subprocess.getoutput("rm tmpaws.txt")
        # get the remote info
        cmd = "aws s3 ls --recursive s3://commoncrawl/crawl-data/CC-NEWS/ --no-sign-request > tmpaws.txt && " \
              "awk '{ print $4 }' tmpaws.txt && " \
              "rm tmpaws.txt"
        self.__logger.info('executing: %s', cmd)
        stdout_data = subprocess.getoutput(cmd)
        print(stdout_data)

        lines = stdout_data.splitlines()
        return lines