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Re: Cumulative internet data transfer {up AND down}

On 11/17/2017 08:54 AM, Roberto C. Sánchez wrote:
On Fri, Nov 17, 2017 at 08:52:00AM -0600, Richard Owlett wrote:
I'm interested in investigating cumulative data to/from the internet for
selected interval ranging from an hour to a week.
My only connection is a device connected thru a USB port.
My web search turned up only discussion of measuring throughput RATE.
Suggestion of keyword(s) for search?
Suggested software?

I am not sure if this fits your needs, but I usually fire up iftop
inside a screen session and leave it running all the time.  It gives me
a nice general cumulative total of up/down traffic and also gives me a
current snapshot (e.g., I run it on my network's router so I can see
which device might be monopolizing the connection).

Not sure if it is relevant. Looking at man-page at https://manpages.debian.org/stretch/iftop/iftop.8.en.html , it's purpose is to monitor instantaneous speed not cumulative data transferred.

*HOWEVER* The "See Also" section has potentially valuable links.

tcpdump(8) may supply raw data for a script which would meet requirements.

driftnet(1) may literally display answer to and one underlying question that prompted this thread.

Thank you.