Check whether elasticsearch is running fine

You can access it at http://localhost:9200 on your web browser, which returns this:

{
  "ok" : true,
  "status" : 200,
  "name" : "Ultra-Marine",
  "version" : {
    "number" : "0.19.0",
    "snapshot_build" : false
  },
  "tagline" : "You Know, for Search"
}