If you get this “IP Traffic Monitor already listening on eth0” error when you are trying to use iptraf:
IP Traffic Monitor already listening on eth0
Or any other interface like eth1 or wlan0 and so on…
Be sure that you don’t have any iptraf applications running:
ps ax|grep iptraf
and after that you […]
I often use laptop which have integrated wifi card and I often need external USB network card too and sometimes internal is WLAN0 and sometimes it was WLAN1 and of course opposite for that external card. That’s why it was really annoying and almost impossible to write workings scripts that used specific network interfaces.