Bandwith info command

[Matthew Seaman]

Ben Washington-Yule wrote:
> What command can I use to see what is using the bandwith on my 56kbs 
> dialup internet connection?

If you want to see what's using the bandwidth *right now*, then 
something like:

     # tcpdump -n -i tun0

(Nb. if you don't turn of DNS resolution using -n, you'll almost 
definitely conclude that it is DNS traffic that's eating all your 
bandwidth).

If you prefer a more graphical interface, ethereal (ports: net/ethereal) 
is a good tool.  Or you can use ports like tcpflow or tcpshow if the 
output of tcpdump isn't to your taste.

If you're more concerned with monitoring usage in the long term, then 
look into network monitors like mrtg or nagios + nagiosstat or cricket 
which will produce graphs of time series data -- note, some scripting 
and general fiddling about will be required to make those tools display 
precisely what you want.  Batteries not included.

	Cheers,

	Matthew

-- 
Dr Matthew J Seaman MA, D.Phil.                       8 Dane Court Manor
                                                       School Rd
PGP: http://www.infracaninophile.co.uk/pgpkey         Tilmanstone
Tel: +44 1304 617253                                  Kent, CT14 0JL UK
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