Monitor Network Traffic and Bandwidth Usage In Real Time
If you want to monitor network throughput on the command line interface, use nload application. It is a console application which monitors network traffic and bandwidth usage in real time. It visualizes the in and outgoing traffic using two graphs and provides additional info like total amount of transferred data and min/max network usage.
yum install nload
sudo apt-get install nload
nload nload device nload [options] device1 device2