Security

It is always recommended that you apply security on every piece of information that will be important to you and others; that applies in this case, too. Even when you are storing something seemingly unimportant, it may still contain data that will be useful to someone. It's always better to apply security and create strong passwords. Elasticsearch provides a plugin called X-pack, which eases the process of applying security for both the Elasticsearch engine and the Kibana tool.

Securing Elasticsearch

First of all, open up the terminal and execute the following command to browse the installation folder of Elasticsearch, which in our case is /usr/share/elasticsearch/bin:

$ cd /usr/share/elasticsearch/bin

The...