1. check if server is up:

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    curl 'http://localhost:9200/?pretty'

  2. count the number of documents in the cluster:

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    curl -XGET 'http://localhost:9200/_count?pretty' $Payload

  3. Index a document & put data:

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    curl -XPUT http://localhost:9200/megacorp/employee/1 -d '{"first_name":"Douglas","last_name":"Fir","age":35,"about":"I like to build cabinets","interests":["forestry"]}

  4. retrieving a document:

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    curl http://localhost:9200/megacorp/employee/1

  5. get all docs:

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    curl http://localhost:9200/megacorp/employee/_search

  6. search query:

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    curl http://localhost:9200/megacorp/employee/_search\?q\=last_name:Smith

  7. search with Query DSL：

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        {
        "query": {
            "match": {
                "last_name": "Smith"
            }
        }
    }

  8. highlight Searches with DSL:

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    curl -H "Content-Type: application/json" http://localhost:9200/megacorp/employee/_search -d '{"query":{"match_phrase":{"about":"rock climbing"}},"highlight":{"fields":{"about":{}}}}'

  9. query with aggregations:

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    curl -H "Content-Type: application/json" http://localhost:9200/megacorp/employee/_search -d {"aggs":{"all_interests":{"terms":{"field":"interests"},"aggs":{"avg_age":{"avg":{"field":"age"}}}}}}

  10. create a document, and not overwriting an existing one: _create

  11. get mapping info:

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    http://localhost:9200/megacorp/_mapping