Basic Elastic Search commands over terminal (Command Line Interface) can be handy when Kibana or any other fancy interface is not available and you need to do a basic troubleshooting.
We will use curl - to make HTTP requests from command line.
In the example it is assumed you are at the same box as the Elastic Search instance. Replace localhost with your actual host name/IP if you are doing debug from a remote terminal. We also assume you are using standard Elastic Search port 9200. Replace it with your value if you tweaked it. MY_INDEX is a placeholder for whatever index you'll be working with. pretty=1 is to get nice multiline output.
Get all indexes from the Elastic Search:
curl http://localhost:9200/_aliases?pretty=1
Make a query to Elastic Search. In this example that's just trivial search for all "response" fields with value "200". You may caonstruct way more complex queries with
lucene syntax.
curl -XGET 'http://localhost:9200/MY_INDEX/_search?q=response=200&pretty=1'
Delete a given index:
curl -XDELETE 'localhost:9200/MY_INDEX/'