Apache Solr is an open-source, highly scalable, reliable, and fault-tolerant search tool based on Java. It supports NoSQL and database queries through REST APIs such as Elasticsearch. In addition, it stores data and provides distributed indexing, replication, automated fail-over and recovery, and load-balanced querying to achieve data querying in near real-time. In this article, you will learn how to install Apache Solr on Ubuntu 20.04 Server. * Deploy a [fully updated](https://docs.vultr.com/ho......