Apache Solr is an open-source search platform written on Java. Solr provides full-text search, spell suggestions, custom document ordering and ranking, Snippet generation, and highlighting. Apache Solr runs as a standalone full-text search server. Its REST-like HTTP/XML and JSON APIs make it usable from most other popular programming languages.

This tutorial will help you to install Apache Solr 9.0 on Ubuntu 20.04 LTS systems.

Prerequisites

First of all, log in to your Ubuntu system with sudo privileged account. Now, run the below command to upgrade the current packages on your system.

sudo apt update && sudo apt upgrade

Step 1 – Installing Java

Apache Solr 9 required Java 1 or greater version. Make sure your system fulfills the Java requirements of Apache Solr. If you don’t have java installed on your system, execute the following command:

sudo apt install openjdk-11-jdk 

Verify active Java version:

java -version 

openjdk version "11.0.11" 2021-04-20
OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2.20.04)
OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2.20.04, mixed mode, sharing)

Step 2 – Installing Solr on Ubuntu

Now download the required Solr version from its official site or mirrors. Or simply use the following command to download Apache Solr 9.0 on your system.

wget https://dlcdn.apache.org/solr/solr/9.0.0/solr-9.0.0.tgz 

Then, extract Apache Solr service installer script from the downloaded Solr archive file. Run the installer followed by the archive file as below:

tar xzf solr-9.0.0.tgz solr-9.0.0/bin/install_solr_service.sh --strip-components=2 
sudo bash ./install_solr_service.sh solr-9.0.0.tgz 

Step 3 – Manage Solr Service

Solr is configured as a service on your system. You can simply use the following commands to Start, Stop and check the status of the Solr service.

To view the status of solr server, type:

sudo systemctl status solr 

Use following commands to stop and start Apache solr service:

sudo systemctl stop solr 
sudo systemctl start solr 

Step 4 – Create Collection in Solr

After the successful installation of Solr on your system. Create the first collection in Apache Solr using the following command.

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

Sample output:

Created new core 'mycollection'

Step 5 – Access Solr Admin Panel

The default Apache Solr runs on port 8983. So, you can access your Solr service to this port in your web browser using the server IP or domain name.

  http://demo.tecadmin.net:8983/

Install Apache Solr Ubuntu 20.04

Now, select “mycollection” under Core Selector drop down in left sidebar. This will show you the statics of the selected collection.

How to create collection in Apache Solr

Conclusion

In this tutorial, you have learned to install Apache Solr on Ubuntu 20.04 LTS system. Also created a collection in the Solr.