OpenNMS is an enterprise-grade open source network management platform that can be used to monitor and manage numerous devices from a single instance. With all kinds of metrics collected by OpenNMS, system administrators can easily discover service outages and latency and then make informed decisions accordingly. - A newly deployed Vultr CentOS 7 x64 server instance with at least 2GB of memory. Say its IP address is `203.0.113.1`. - Ability to log in as root. - The server instance has been [upda......