Use iftop to monitor network traffic

Use iftop to monitor network traffic

Iftop is a useful tool. The following command monitors the wireless network card of my notebook

Iftop-I wlan0

Basic description:

1. the main part of the screen is the data transfer between two machines, with an arrow indicating the direction. The three values on the right are the average traffic of the past 2 seconds, 10 seconds, and 40 seconds, respectively.

2. TX in the lower-left corner indicates the sent data, and RX indicates the received data,

Cum indicates the Total traffic, and peak indicates the corresponding peak value, so you do not need to explain Total.