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Possible Duplicate:
How do I find out which process is eating up my bandwidth?

Sometimes there is unusual internet activity on my Computer. The modem's lights are always blinking and when I open system monitor, I see there some unknown program is using my precious internet with 64KB/S (I have 512kbps connection). I am in a firefox session with only one tab opened, and the page is already loaded and there is no busy sign in the page (that rotating orange circle).

In that situation I unplug my modem and reconnect it again. After several times doing this, that unusual activity stops. It annoys me very much.

How can I find out the process which is using the Internet?. How much it is using? How can I kill it?

A graphical solution will be better.

marked as duplicate by jokerdino, Anwar, ish, Bruno Pereira Jun 18 '12 at 7:58

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  • NetHogs may help (sudo apt-get install nethogs)
  • Run with sudo nethogs <interface> (interface can be eth0, wlan0, etc.), and observe it for a while:

enter image description here

  • Then use htop (install if necessary) to "graphically" kill the process. You will probably get better results by telling us which process it is and then disabling it, instead of swatting it like a fly every time it pops up ;)
  • I had exactly the same problem. And this solved my problem. There was a python application using the whole bandwidth. It seems that you have it too in the picture you've sent :) What is that? – Mostafa Shahverdy Oct 18 '13 at 2:30
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Maybe IPTraf can help you.
I don't use it, but it seems to do what you need.

this image

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