Kali linux wpa_supplicant cli config.

To setup a wifi connection using wpa_supplicant on the cli in kali, first you have to bring up your network interface

ifconfig wlan0 up

Next, we create a config file

wpa_passphrase 'router_ssid' 'wifi_password' > /etc/wpa_supplicant.conf

We need to edit the config file and remove some things

vim /etc/wpa_supplicant.conf

Change the config file so that it contains:

network={
    ssid="router_ssid"
    #psk="wifi_password"
    psk=long_hex_string_goes_here
}

Finally, we can auth with our router and obtain an ip address to access the network

sudo wpa_supplicant -B -iwlan0 -c/etc/wpa_supplicant.conf -Dwext
sudo dhclient wlan0