curl -XGET http://localhost:9200/ status

curl -XGET http://localhost:9200/_status

{
  "error": {
    "root_cause": [
      {
        "type": "invalid_index_name_exception",
        "reason": "Invalid index name [_status], must not start with '_'.",
        "index": "_status",
        "index_uuid": "_na_"
      }
    ],
    "type": "invalid_index_name_exception",
    "reason": "Invalid index name [_status], must not start with '_'.",
    "index": "_status",
    "index_uuid": "_na_"
  },
  "status": 400
}

curl -XGET http://localhost:9200/_cluster/health

9200

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