[Monica](https://www.monicahq.com/) is an open source personal relationship management system. Think of it as a CRM (a popular tool used by sales teams in the corporate world) for your friends or family. Its source code is publicly hosted on [GitHub](https://github.com/monicahq/monica). In this guide, we will go over the installation process of a Monica application. - Git - NPM (Node Package Manager) - PHP 7.1 or newer - MariaDB - Nginx - Composer Check the CentOS version. cat ......