Elasticsearch performs a good job of finding matching results also in big text documents. It's useful for searching text in very large blocks, but to improve user experience, you need to show users the abstract: a small portion of the text that has matched the query. The abstract is a common way to help users to understand how the matched document is relevant to them.
The highlight functionality in Elasticsearch is designed to do this job.
You will need an up-and-running Elasticsearch installation as used in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.
To execute curl via a command line you need to install curl for your operating system.
To correctly execute the following commands, you will need an index populated with the chapter_05/populate_query.sh script available in the online code.
