update draft raspberry notes

content/notes/raspberry-pi/index.md

@@ -21,6 +21,24 @@ draft: true
 
 4GB version, if that information is of any use.
 
+### No network after boot
+
+Sometimes I make mistakes in my initial `wpa_supplicant.conf` file (that I'd place on
+the boot partition of the new Raspberry Pi SDcard). Recently my `wpa_supplicant.conf`
+file was totally messed up (a bracket too much I think).
+
+So there is a quick way to connect to a WiFi network with the use of `nmcli` (NetworkManager).
+
+~~~console
+$ sudo nmcli device wifi connect [ssid] password [password]
+~~~
+
+You can view networks with (no need for _sudo_):
+
+~~~console
+$ nmcli device wifi list
+~~~
+
 ## Raspberry Pi 3
 
 ## Raspberry Pi 2