Internet detection that also works behind proxy https://github.com/armbian/config/issues/35

debian-config

@@ -24,7 +24,7 @@ fi
 #
 # check for internet connection to install dependencies
 #
-echo -e "GET http://github.com HTTP/1.0\n\n" | nc github.com 80 > /dev/null 2>&1
+wget -q --spider http://github.com
 if [[ $? -ne 0 ]]; then
 		read -n 1 -s -p "Warning. Configurator can't work properly without internet connection. \
 		Press CTRL C to stop to stop or any key to ignore and continue."