Just Installed Ubuntu 6.06LTS, from a downloaded ISO. was connected to the net during install and all looks good, I have used "Synaptic package manager" to add some bizzo and ticked all the repository boxes so I could get Aircrack and Kismet instaled. That much was surprisingly easy for someone who has only ever installed fedora and red hat, but never been able to do much with them, however Ubuntu has my interest and I want to do more. I intend to do some security checking of Wlans, my own first, I am told these two apps (Aircrack and Kismet) can crack a wpa-psk in under an hour. I have downloaded the Atheros drivers for the Cisco-CB21AG pcmcia card I intend to use but am a bit stumped as to how to get them into the notebook (IBM thinkpad R52). Following the newbie guide at aircrack-ng. I would get an error message in the terminal telling me that "make" was an unknown command, so I went back into synaptic and found "make", "makedev" and "makedepend". I installed these and now make tries to run but gives me... tsp10402@SN-GHG:~/Desktop/madwifi-0.9.2$ make /bin/sh: line 0: cd: /lib/modules/2.6.15-27-386/build: No such file or directoryMakefile.inc:89: *** /lib/modules/2.6.15-27-386/build is missing, please set KERNELPATH. Stop. tsp10402@SN-GHG:~/Desktop/madwifi-0.9.2$ I assume I am missing some of the kernel files but don't know what they are or how to get them installed. Thanks for any assistance. G.