Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, path names, dummy URLs, user input, and Twitter handles. Here is an example: "To run Logstash, we need to install Logstash and edit the configuration file logstash.conf."

A block of code is set as follows:

input {
     file {
         path => "/var/log/apache2/access.log"
         }
 }

Any command-line input or output is written as follows:

curl -L -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.3.tar.gz

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "To get the statistics, we need to select Statistics from the dropdown."