How To Install Apache Solr 9.4 on Ubuntu 18.04

Apache Solr is a powerful, open-source search platform built on Apache Lucene. It’s widely used for enterprise search and analytics use cases and has a robust set of features like full-text search, real-time indexing, and more. In this guide, we will walk you through the steps to install Apache Solr 9 on Ubuntu 18.04 and 16.04 LTS systems.

Prerequisites

Before starting, ensure that you have:

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• A system running Ubuntu 18.04
• Sudo privileges or access to the root user
• Basic knowledge of Linux terminal commands

Step 1: Update the System

First, update your system to ensure all existing packages are up to date:

sudo apt-get update 
sudo apt-get upgrade 

Step 2: Install Java

Apache Solr 9.4 requires Java to run. Check if Java is installed:

java -version 

If Java is not installed, you can install the default JDK with the following command:

sudo apt install default-jdk 

Step 3: Download Apache Solr

You can download the latest version of Solr from the Apache website. At the time of writing, the latest version is 9.4.

wget https://dlcdn.apache.org/solr/solr/9.4.1/solr-9.4.1.tgz 

Step 4: Extract the Solr Installer

Once the download is complete, extract the Solr installation script:

tar xzf solr-9.4.1.tgz solr-9.4.1/bin/install_solr_service.sh --strip-components=2 

Step 5: Install Solr

Now, install Solr using the script:

sudo bash ./install_solr_service.sh solr-9.4.1.tgz 

This script will set up Solr as a service on Ubuntu.

Step 6: Start the Solr Service

After installation, you can start the Solr service:

sudo service solr start 

Step 7: Verify the Installation

To ensure Solr is running correctly, open your web browser and navigate to http://your_server_ip:8983/solr/. Replace your_server_ip with your actual server IP address. If Solr is running, you should see the Solr admin panel.

Step 8: Create a Solr Collection

Now, create your first Solr collection:

sudo su - solr -c "/opt/solr/bin/solr create -c mycol1 -n data_driven_schema_configs" 

Step 9: Manage Solr Service

You can use the following commands to stop, start, and check the status of the Solr service:

• To stop Solr:

  sudo service solr stop 
  

• To start Solr:

  sudo service solr start 
  

• To check Solr status:

  sudo service solr status 
  

Conclusion

Congratulations! You have successfully installed Apache Solr 9.4 on Ubuntu 18.04. You can now start indexing your data and use Solr for your search applications. Remember to regularly check the official Apache Solr documentation for advanced configurations and best practices to get the most out of Solr.

Disclaimer: This guide is provided for informational and educational purposes only. Always test installations and configurations in a controlled environment before applying them to production systems.