I was very interested in this option as well (which is why I am on this list). I was not able to find a good solution with iftop but I did find another utility called 'bwm-ng' that has an output to csv option which suited my needs.

http://www.gropp.org/?id=projects&sub=bwm-ng

Here is an example of how I used it:

bwm-ng --count 0 -o csv -I eth0 -T rate -u bytes -t 1000 > yourfile.csv

Thanks, Andy

On Sun, Sep 27, 2009 at 11:03 AM, Roman Weidlich < roman.weidlich@univie.ac.at> wrote:

Hi,

is it possible to log to a file?

iftop > mylog.txt

produces a file, but containing lo senseful data.

Roman

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