CentOS - Sep 2021 - Find out which process consumed Network bandwidth

Hi,

I am running CentOS Linux release 7.9.2009 (Core). Is there a way to find
out which process consumed network bandwidth during a specific time period?

For example, the Nginx process consumed how much network traffic on Sept
01, 2021.

Best Regards,

Kaushal

On 06/09/2021 19:35, Kaushal Shriyan wrote:

Hi Kaushal,
> I am running CentOS Linux release 7.9.2009 (Core). Is there a way to find
> out which process consumed network bandwidth during a specific time period?
> 
> For example, the Nginx process consumed how much network traffic on Sept
> 01, 2021.
As far as I know, such accounting isn't done in a standard CentOS
system, so there's no way to determine such information about a past event.

Regards,
Anand

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Take a look at Cacti, which is available in the EPEL repo:

https://www.cacti.net/

It's not just for network accounting. It polls multiple hosts for all 
kinds of data and keeps RRD tables for display. Cacti provides a web 
interface that can display the data in charts. You'll need to install 
plugins for iptables to do the actual data collection.

I've used this to track per-host Internet usage on my LAN by adding an 
iptables chain with one do-nothing rule per LAN host, just to maintain a 
counter for Cacti to poll.