Cacti is a free and open source network monitoring and graphing tool written in PHP. With the help of RRDtool (Round-Robin database tool), Cacti can be used to provide various useful features, including remote and local data collectors, graph templating, network discovery, device management automation, etc. - A fresh Vultr CentOS 7 x64 server instance. Say its IP address is `203.0.113.1`. - A [sudo](https://docs.vultr.com/how-to-use-sudo-on-a-vultr-cloud-server) user. - The server instance has b......