initially I tried with sudo bin/elasticsearch-plugin install license but it was not working hence I posted new topic.
Did you get it to work?
Also.,, Is there any way to get elasticsearch access log?? who viewed our index or who queried our index..
The Elasticsearch Access Log is a feature of Shield in 1.x/2.x and X-Pack Security (effectively Shield renamed) in 5.x+.
2.4: Enable Auditing | Shield [2.4] | Elastic
5.x: Auditing Security Events | X-Pack for the Elastic Stack [5.1] | Elastic
Hope that helps,
Chris