3 Best Command Line Tool for Network Bandwidth Monitoring - debugpoint.com
A quick look at three best tools for network bandwidth monitoring in Ubuntu, Linux. These tools need the network interface name as argument in the command line. To find out the network interface name (wired, wireless), run below command from terminal. ifconfig Good thing about these tools is they are available in Ubuntu repos.
https://www.debugpoint.com/2016/10/3-best-command-line-tool-network-bandwidth-monitoring-ubuntu-linux/