kopf is a Kibana plugin used to manage Elasticsearch with a GUI. In Elastic Stack 5.x it has been replaced by Cerebro. For Sec555, use kopf.
kopf can be downloaded from XYZ.
kopf can be used to change index settings as well as to delete indexes.
To access kopf, browse to http://server_name_goes_here:5601/_plugin/kopf where server_name_goes_here is the name of the Kibana host.
In the student VM, you can access kopf by going to: http://localhost:5601/_plugin/kopf
To delete and index open the kopf home page. Click on the down arrow next to the index you wish to delete and then click on delete index.