To build a wpa_supplicant configuration file:
# wpa_passphrase testap >> /etc/wpa_supplicant/testap.conf a_password # cat /etc/wpa_supplicant/testap.conf # reading passphrase from stdin network={ ssid="testap" #psk="a_password" psk=1b97a5c02076ac80739263fb33db49c7c50d3199202872e06097e7baf305f35e }
Additional info at How to connect to a WPA/WPA2 WiFi network using Linux command line.