But you can use the suite. Try this after installing aircrack-ng start Xterm, and become root. Then enter: airodump-ng wlan0 This will show you what networks are around, and the MAC addresses of the access points and computers which are connected, and what channels they are operating on. Make a note of the channel of the access point you want to test (ie your own one)
Now quit airodump-ng by doing a control c , then restart it by typing airodump-ng -c X -w mycapture --ivs wlan0 but change the X for the channel number of your access point. This will start capturing data which you will use to crack the WEP key, in a file called mycapture-01.ivs in your home directory Now you have to wait for a while, till you have captured enough data to crack the WEP key. If the access point is busy then you might not have to wait too long.