curl: (7) Failed connect to localhost:9200； Connection refused

问题：没有授权
curl: (7) Failed connect to localhost:9200; Connection refused

解决办法：修改elasticsearch.yml下的 network.host值0.0.0.0
表示对所有的ip授权

编辑配置文件
vi /usr/local/elasticsearch-6.2.3/config/elasticsearch.yml

问题解决：
测试是否可以正常访问

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