Have not blogged on any security-related topics in a while so I thought it was time. Scapy is a Python-driven program for generating TCP/IP packets on the fly and programtically. If you fire up Scapy on a fresh Backtrack 5 system you will be welcomed with two dependency errors; one complaining about the GNUPlot Python library and the other for PyX. I think there was another one for a GUI library, but can’t seem to find it in my Bash history.
Like most things Ubuntu/Debian the fix is pretty trivial:

apt-get install python-scitools python-pyx

There you go, happy packet hacking!