def _get_version_output(self):
        if not self.executable:
            return ''
        command = [self.executable, '--version']
        out, _, _ = self._check(self.conn, command)
        try:
            return out.split()[2]
        except IndexError:
            return ''
Returns a dictionary keyed by Redis server of ping command output
dataset/ETHPy150Open ceph/ceph-deploy/ceph_deploy/util/packages.py/Ceph._get_version_output--crossover with--dataset/ETHPy150Open gmr/mredis/mredis/client.py/MRedis.ping