Openfire is a free and open source XMPP server which is being widely deployed in enterprises and organizations to deliver real time collaborations. In this article, I will guide you through installing Openfire on a CentOS 7 x64 server instance. - A fresh Vultr CentOS 7 x64 server instance. Say its IP address is `203.0.113.1`. - A [sudo user](https://docs.vultr.com/how-to-use-sudo-on-a-vultr-cloud-server). - The server instance has been [updated to the latest stable status using the EPEL YUM repo......