Shamelessly copied from https://haydenjames.io/linux-networking-commands-scripts/
- arpwatch – Ethernet Activity Monitor.
- bmon – bandwidth monitor and rate estimator.
- bwm-ng – live network bandwidth monitor.
- curl – transferring data with URLs.
- darkstat – captures network traffic, usage statistics.
- dhclient – Dynamic Host Configuration Protocol Client
- dig – query DNS servers for information.
- dstat – replacement for vmstat, iostat, mpstat, netstat and ifstat.