LINUX: net monitoring tools

LINUX: net monitoring tools

Sometimes I saw a great network activity but I do not know what happening.
We can investigate who eats our traffic by:

$ sudo iftop -i wlan0

There are many information displayed. In and out rates, graphical view for every connection by in and out.
Here we can see CONNECTION url and rates.
and another way is

$ sudo nethogs wlan0

The output looks much better for eye and all processes are sorted by traffic.
Here we can see PID, PROGRAMM, USER and DEVICE with rates. It allows you to find and quickly kill process.