v6.0

+ Always generate default /etc/dphys-swapfile:
https://github.com/Fourdee/DietPi/pull/1362#issuecomment-354759731

dietpi/func/dietpi-set_dphys-swapfile

@@ -27,8 +27,14 @@
 	export G_PROGRAM_NAME='DietPi-dphys-swapfile'
 	#Import DietPi-Globals ---------------------------------------------------------------
 
-	SWAP_SIZE_CURRENT=$(cat /etc/dphys-swapfile | grep -m1 '^CONF_SWAPSIZE=' | sed 's/.*=//')
-	SWAP_LOCATION_CURRENT=$(cat /etc/dphys-swapfile | grep -m1 '^CONF_SWAPFILE=' | sed 's/.*=//')
+	SWAP_SIZE_CURRENT=0
+	SWAP_LOCATION_CURRENT='/var/swap'
+	if [ -f /etc/dphys-swapfile ]; then
+
+		SWAP_SIZE_CURRENT=$(cat /etc/dphys-swapfile | grep -m1 '^CONF_SWAPSIZE=' | sed 's/.*=//')
+		SWAP_LOCATION_CURRENT=$(cat /etc/dphys-swapfile | grep -m1 '^CONF_SWAPFILE=' | sed 's/.*=//')
+
+	fi
 
 	SWAP_SIZE_TARGET=$SWAP_SIZE_CURRENT
 	if [[ $1 =~ ^-?[0-9]+$ ]]; then
@@ -42,12 +48,24 @@
 
 	SERVICE_MODE=""
 
+	Generate_Default_Conf(){
+
+	cat << _EOF_ > /etc/dphys-swapfile
+CONF_SWAPSIZE=0
+CONF_SWAPFILE=/var/swap
+_EOF_
+
+	}
+
 	Delete_Swapfile(){
+
 		G_DIETPI-NOTIFY 2 "Deleting existing swapfile ($SWAP_LOCATION_CURRENT)\n"
 		rm "$SWAP_LOCATION_CURRENT" &> /dev/null
+
 	}
 
 	Update_Conf(){
+
 		sed -i "/CONF_SWAPSIZE/c\CONF_SWAPSIZE=$SWAP_SIZE_TARGET" /etc/dphys-swapfile
 		sed -i "/CONF_SWAPFILE/c\CONF_SWAPFILE=$SWAP_LOCATION_TARGET" /etc/dphys-swapfile
 
@@ -62,6 +80,8 @@
 
 		SWAP_SIZE_TARGET=0
 		SERVICE_MODE="disable"
+
+		Generate_Default_Conf
 		dphys-swapfile swapoff
 		Delete_Swapfile
 
@@ -76,6 +96,7 @@
 		G_DIETPI-NOTIFY 2 "Location = $SWAP_LOCATION_TARGET"
 
 		SERVICE_MODE="enable"
+		Generate_Default_Conf
 		dphys-swapfile swapoff
 		Delete_Swapfile