Hello !

I'm using Aircrack-ng on my BPI running Raspian v3

Quick installation tutorial for beginners :

Get root :

1. sudo su -

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Download required packages :

1. apt-get update
   
2. apt-get install libnl1 libnl-dev libnl-3-dev libnl-genl-3-dev iw

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Download aircrack-ng sources (grab last version) :

1. wget http://download.aircrack-ng.org/aircrack-ng-1.2-beta3.tar.gz

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Uncompress :

1. tar xvzf aircrack-ng-1.2-beta3.tar.gz

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Compile & install :

1. cd aircrack-ng-1.2-beta3
   
2. make
   
3. make install

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[Optional] : remove useless installation files for free space:

1. cd ..
   
2. rm -Rf aircrack-ng-1.2-beta3*

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Update airodump IEEE OUI base:

1. airodump-ng-oui-update

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Then plug your Wireless usb adapter, and see if raspian detect it :

1. dmesg

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example with my adapter:
[ 3533.064296] usb 1-1: new high-speed USB device number 2 using sw-ehci
[ 3533.368525] usb 1-1: New USB device found, idVendor=148f, idProduct=2573
[ 3533.374635] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3533.378554] usb 1-1: Product: 802.11g USB WLAN Card
[ 3533.381360] usb 1-1: Manufacturer: WLAN
[ 3533.604520] usb 1-1: reset high-speed USB device number 2 using sw-ehci
[ 3534.090900] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 3534.098215] Registered led device: rt73usb-phy0::radio
[ 3534.102552] Registered led device: rt73usb-phy0::assoc
[ 3534.108182] Registered led device: rt73usb-phy0::quality
[ 3534.113667] usbcore: registered new interface driver rt73usb

Show your network interfaces, here is wlan0 :

1. iwconfig

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1. lo        no wireless extensions.
   
2. tunl0     no wireless extensions.
   
3. 
   
4. wlan0     IEEE 802.11bg  ESSID:off/any
   
5.           Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm
   
6.           Retry  long limit:7   RTS thr:off   Fragment thr:off
   
7.           Encryption key:off
   
8.           Power Management:on
   
9. 
   
10. eth0      no wireless extensions.

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Start your wireless interface in monitor mode:

1. airmon-ng start wlan0

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Interface      Chipset         Driver
wlan0           Ralink 2573 USB rt73usb - [phy0]
                    (monitor mode enabled on mon0)

then use the monitored interface with aircrack suite (here is mon0) :

List all hotspots :

1. airodump-ng mon0

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List only WEP hotspots :

1. airodump-ng --encrypt WEP mon0

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Capture WEP hotspots traffic in file :

1. airodump-ng --encrypt WEP mon0 -w /home/pi/WEP_captures

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For better results, you can capture traffic for specific hotspot, just set this channel & MAC address :

1. airodump-ng -c 11 -bssid xx:xx:xx:xx:xx:xx mon0 -w my_hotspot_capture

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