Configuring Apache Solr 3.6 for Drupal on Ubuntu 14.04, with password authentication
Most of high traffic or complex Drupal sites use Apache Solr as the search engine. It is much faster and more scaleable than Drupal's search module.
In a previous article on Drupal with Apache Solr 4.x, we described one way to install the latest stable Apache Solr 4.x. That article detailed a lot of manual steps involving downloading, extracting, setting permissions, creating a startup script, ...etc.