Examining network connections on Linux systems | Network World

https://www.networkworld.com/article/3230519/linux/examining-network-connections-on-linux-systems.html

Linux systems provide a lot of useful commands for reviewing network configuration and connections. Here’s a look at a few, including ifquery, ifup, ifdown and ifconfig.

You might now most of them, but most propably not all of them… so check out to learn the rest.