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I am running a network related program that performs TLS handshakes with many hosts. I ant to monitor the network traffic so I used nethogs. It shows 0 KB. 

NetHogs version 0.8.5-2

PID USER     PROGRAM                    DEV        SENT      RECEIVED       
  ? root     unknown TCP                            0.000       0.000 KB/sec

  TOTAL                                                 0.000       0.000 KB/sec

I have previously run this program and nethogs was showing me information about the network traffic. What is the problem? How to see the ongoing/outgoing traffic? Are there alternative tools?

I use Ubuntu 18.04. The command I entered:

sudo nethogs

I also tried with the adapter name that I obtain using ifconfig:

sudo nethogs enx9cebe8b0d86a
user9371654
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  • You could try [this](https://askubuntu.com/questions/1097746/how-to-get-rx-and-tx-traffic-data-using-shell-script/1097775#1097775). – Doug Smythies Dec 11 '18 at 19:40
  • You could try `vnStat`. I've used it for years with great success: https://askubuntu.com/questions/1459/how-can-you-monitor-total-internet-data-usage-across-reboots/846455#846455 – WinEunuuchs2Unix Dec 12 '18 at 02:52

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