参考：https://www.cnblogs.com/sxdcgaq8080/p/11118947.html

1.curl http://172.16.18.17:9200

{ "name" : "node-1", "cluster_name" : "my-application", "cluster_uuid" : "9_YY1EoaR265QvxCeDkHPQ", "version" : { "number" : "7.6.2", "build_flavor" : "default", "build_type" : "tar", "build_hash" : "ef48eb35cf30adf4db14086e8aabd07ef6fb113f", "build_date" : "2020-03-26T06:34:37.794943Z", "build_snapshot" : false, "lucene_version" : "8.4.0", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search"}

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2.curl http://172.16.18.17:9200/_cat

_cat：列出es命令参数

=^.^=/_cat/allocation/_cat/shards/_cat/shards/{index}/_cat/master/_cat/nodes/_cat/tasks/_cat/indices/_cat/indices/{index}/_cat/segments/_cat/segments/{index}/_cat/count/_cat/count/{index}/_cat/recovery/_cat/recovery/{index}/_cat/health/_cat/pending_tasks/_cat/aliases/_cat/aliases/{alias}/_cat/thread_pool/_cat/thread_pool/{thread_pools}/_cat/plugins/_cat/fielddata/_cat/fielddata/{fields}/_cat/nodeattrs/_cat/repositories/_cat/snapshots/{repository}/_cat/templates

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3.curl http://172.16.18.17:9200/_cat/indices?v

？v 列出查询详细结果（带属性标识）

4.创建索引

curl -XPUT http://192.168.6.16:9200/my_new_index?pretty

?pretty：“pretty”来告诉Elasticsearch，做JSON格式化输出

5.插入数据

（1）错误方法

此原因时由于ES增加了安全机制， 进行严格的内容类型检查，严格检查内容类型也可以作为防止跨站点请求伪造攻击的一层保护。 

 （2）解决，增加-H

curl -H "Content-Type: application/json" -XPUT http://172.16.18.17:9200/index_test/user/1?pretty -d ‘{"name":"张三","age":"23"}‘

6.查询数据

curl -XGET http://172.16.18.17:9200/index_test/user/1?pretty

7.更新数据

curl -XPOST http://192.168.6.16:9200/my_new_index/user/2/_update?pretty -d ‘{"doc":{"name":"李四更新","age":"230"}}

8.删除数据

curl -XDELETE http://192.168.6.16:9200/my_new_index/user/2?pretty

9.查询某个索引中的所有数据

curl -XGET http://172.16.18.17:9200/index_test/user/_search?pretty