Installing Elasticsearch on Ubuntu 18.04

Elasticsearch is a powerful search and analytics engine used for storing, searching, and analyzing large volumes of data. It is built on top of Apache Lucene and provides a scalable and distributed architecture, making it suitable for various use cases such as full-text search, log analysis, and data visualization.

Step 1: Update System Packages

Before installing Elasticsearch, it's always a good idea to update your Ubuntu system packages to their latest versions. Open the terminal and run the following commands:

• sudo apt update updates the package lists for upgrades for packages already installed on your system.
• sudo apt upgrade installs the most recent versions of all packages currently installed on your system.

Step 2: Install Java

Elasticsearch requires Java to run. You can check if Java is already installed by running the command java -version. If it's not installed, you can install it by running the following command:

Step 3: Download and Install Elasticsearch

Next, we will download and install Elasticsearch. Run the following commands in the terminal:

Step 4: Configure Elasticsearch

After the installation is complete, we need to configure Elasticsearch. Open the configuration file using the command:

Inside the file, find the line that starts with # network.host: and replace it with:

Save the changes and exit the editor.

Step 5: Start and Enable Elasticsearch

Start Elasticsearch service and enable it to start on boot with the following commands:

Step 6: Test Elasticsearch

To verify if Elasticsearch is running properly, run the following command:

If everything is fine, you should get a response containing information about your Elasticsearch instance.

Congratulations! You have successfully installed Elasticsearch on Ubuntu 18.04. You can now integrate Elasticsearch with your applications to perform powerful search and analytics tasks.