wpa wpa_cli wpa_supplicant passphrase wifi network
Source
$ wpa_passphrase <SSID>
#reading passphrase from stdin
<ENTER PASSPHRASE>⏎
network={
ssid="<SSID>"
#psk="<PASSPHRASE>"
psk=07d57d914e1b88b356fd6bf12f6d2b3d168a1f94f0ba97daae9391d0cb342151
}Note that the SSID has to match the actual SSID of the WiFi, otherwise the PSK will be wrong and connection to the WiFi will fail.