Using Finnix 111 rescue CD:
Generate wpa_supplicant.conf configuration file:
# wpa_passphrase ssid passphrase > /etc/wpa_supplicant.conf
If you have any funky characters like ‘@’ in your passphrase, escape with a ‘\’.
# wpa_supplicant –help
Using the correct driver:
# wpa_supplicant -Dnl80211 -iwlan0 -c/etc/wpa_supplicant.conf -B
My driver listed was ‘nl80211’. Also, do not add a space between the options and their arguments.
Use ifconfig to find the network interface.
# dhclient wlan0