In this tutorial, we will explain how to install Redmine 2.6 on an Ubuntu 14.04 VPS with MariaDB, Puma and Nginx. Redmine is a flexible open source issue tracking and web-based project management application . Redmine is built on Ruby on Rails framework and it is cross-platform and cross-database. This guide should work on other Linux VPS systems as well but was tested and written for Ubuntu 14.04 VPS.