When setting up my latest Raspberry Pi recently I discovered that configuring the wireless network on Raspbian ‘Stretch’ is done slightly differently from previous versions.
First you need to edit wpa_supplicant.conf to set up your network’s SSID and password.
$ sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
/etc/wpa_supplicant/wpa_supplicant.conf
network={
scan_ssid=1
ssid="<SSID>"
psk="<Password>"
}
scan_ssid=1
ssid="<SSID>"
psk="<Password>"
}
Then you need to configure /etc/network/interfaces to use wpa_supplicant.conf to configure the wireless network.
$ sudo nano /etc/network/interfaces
/etc/network/interfaces
auto lo
iface lo inet loopback
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
allow-hotplug eth0
iface eth0 inet dhcp
iface lo inet loopback
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
allow-hotplug eth0
iface eth0 inet dhcp
If you have got it right then the next time you reboot it should connect…
Notes on Linux 
Let me know if you get wicd-curses working on there. there are also front-ends for wpa_supplicant, some of which probably work. Of course its also good to have a working wpa_supplicant configuration to start from, like you do here.