Enterprise Networking Planet: Keep an Eye on Your Linux Systems with Netstat

“Two of the fundamental aspects of Linux system security and
troubleshooting are knowing what services are running, and what
connections and services are available. We’re all familiar with ps
for viewing active services. netstat goes a couple of steps
further, and displays all available connections, services, and
their status. It shows one type of service that ps does not:
services run from inetd or xinetd, because inetd/xinetd start them
up on demand…”

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