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From time to time connection to my server is very slow. This could be that someone is doing large uploads or downloads. Since I have a lot of software on my server I would like to find out, which process is responsible for the traffic.

Is there a simple command which lists processes which are currently doing network communication, sorted by the amout of traffic that was created in the last x seconds?

My system is running Ubuntu.

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    Server operating system? – Greg Askew Aug 22 '13 at 11:53
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You could use this post on AskUbuntu
This post explain installing and using iftop.

  • I hoped for on board tools. Can't beliefe such basic feature needs third party software. – Witek Aug 22 '13 at 13:53
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You can use something like nethogs (http://nethogs.sourceforge.net/) or iftop (http://www.thegeekstuff.com/2008/12/iftop-guide-display-network-interface-bandwidth-usage-on-linux/).

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