ystem - Various Kernel Statistics
- lsof - list open files, network connections and much more.
- nmap - scan your server for open ports.
- ntop web based tool - ntop is the best... e ====
=== Cachet ===
https://cachethq.io/
The open source status page system. Beautifully crafted, T... erver And Network Monitoring. Nagios is a popular open source computer system and network monitoring app