Installing Elasticsearch: A Step-by-Step Guide to Get You Started

Elasticsearch is an open-source search and analytics engine designed for rapid search, analysis, and visualization of large volumes of data. Initially developed by Elasticsearch N.V. in 2010, this tool is a distributed search engine that stores JSON documents and allows complex queries to be performed on these documents using RESTful APIs.

Key features of Elasticsearch include:

1. Search and Query:
   • Ability to perform fast and complex search and query operations on datasets.
2. Distributed Architecture:
   • Distributed architecture that allows horizontal scaling of data.
3. JSON Document Storage:
   • Storage of data as JSON documents and the ability to work with these documents.
4. Search Engine:
   • A powerful search engine capable of text search, full-text search, and sorting in a vast dataset.
5. Analysis and Aggregation:
   • Features for data analysis and grouping of results.
6. Integration with Elastic Stack:
   • Elasticsearch can be used in conjunction with tools like Kibana, Beats, and Logstash to create a comprehensive log management and analysis solution.
7. Open Source and Community-Supported:
   • Elasticsearch is an open-source project with extensive support from a user community.

Elasticsearch is commonly used in applications requiring large-scale data storage and analysis. It provides flexibility for users in scenarios such as search engines, log analysis, text mining, and various data analytics applications.

Installing Elasticsearch on Ubuntu:

1. Add Elasticsearch GPG Key:
   • Add the GPG key to verify the Elasticsearch Debian package.
   wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -

2. Add APT Repository:
   • Add the Elasticsearch APT repository.
   sudo sh -c 'echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" > /etc/apt/sources.list.d/elastic-7.x.list'

3. Update Package List:
   • Update the APT package list.
   sudo apt-get update

4. Install Elasticsearch:
   • Install the Elasticsearch package.
   sudo apt-get install elasticsearch

5. Start Elasticsearch Service:
   • Start the Elasticsearch service.
   sudo service elasticsearch start

   • If you want Elasticsearch to start automatically at system startup:
   sudo systemctl enable elasticsearch.service

6. Check the Status:
   • Use the following command to check if Elasticsearch is running.
   curl -X GET "localhost:9200/"

These steps cover the installation of Elasticsearch on Ubuntu using the official APT package. You can customize the steps by updating the Elasticsearch version or installing a specific version.