# Provide the necessary variables to make NETFS use USB information if [[ -z "$BACKUP_URL" ]]; then [[ "$USB_DEVICE" ]] StopIfError "You must specify either BACKUP_URL or USB_DEVICE !" BACKUP_URL="usb://$USB_DEVICE" fi if [[ -z "$OUTPUT_URL" ]]; then [[ "$USB_DEVICE" ]] StopIfError "You must specify either OUTPUT_URL or USB_DEVICE !" OUTPUT_URL="usb://$USB_DEVICE" fi