How to install multicore Apache SOLR 4.7 on Debian 7 or Ubuntu 12.04

As already stated in another article, Apache SOLR is a very fast and extremely powerful search engine which can easily be connected to your Drupal website (for example) using the Drupal module. Its major features include powerful full-text search, hit highlighting, faceted search, near real-time indexing, dynamic clustering, database integration, rich document (e.g., Word, PDF) handling, and geospatial search. In the previous article I explained how to install a basic Apache SOLR server, in this one we will install a multicore server with the latest SOLR 4.7 version. The installation procedure below works both on Debian 7 and Ubuntu 12.04. Installation For now, the latest version of Apache SOLR is currently 4.7, and we will install it on a Tomcat 6 web server. Install Tomcat 6: apt-get update apt-get install tomcat6 tomcat6-admin tomcat6-common tomcat6-user -y Download ...