Hello Frédéric,

I had a look at iftop and the -t option doesn't exist. Well at least in the version that I have installed.

I am running Ubuntu 14.04 LTS.  Which is limited to iftop 1.0~pre2.5.

Once I have first figured out how to update to the newer version of iftop without changing from the current LTS configuration, I will give the "-t" option a try.

Thank you

Philippe

Quoting Frédéric Perrin <fred@fperrin.net>:

Hello Philippe,

On 22/11/2015 14:35, philippe@faure.ca wrote:

Hello,

I am looking to find a way to record data usage from a specific device
on my network. Ideally the out out would be a text file with the total
usage. Is there a way to have iftop run in the background and have it
update a file.

Does the -t option to iftop do what you want? You would redirect the
output to a log file or pipe it to a script.

If not, is there another utility that people know about the might be
able to help me?

Another solution if you're trying to do traffic accounting is something like net-acct. On a students' network, we used to log something like
(timestamp, source IP & port, destination IP & port, volume), and then
use this to hunt bandwidth hogs.

Cheers,
Fred.

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