I've setup a RaspberryPi 3 using a minimum OS like raspberrypi-ua-netinst (preset:server) but also would like to enjoy the onboard wifi-adapter. Unfortunately I can't enter the credentials in the installer-config.txt but would like to add them later. The point is, that the folder:
and the config wpa_supplicant.conf doesn't exist in any case.
Does anybody know how to set up wifi, to get wifi working using the common way via the config to enter the credentials?