The search for a "Hariharananda Kriya Yoga technique PDF" is ultimately a search for your own highest self. The PDF is a symbol of your sincere desire. But the real "file" you are trying to download is not a collection of letters and images; it is a state of consciousness—bliss, peace, and oneness.
After the breath becomes subtle, you close off your ears, nose, and eyes using your fingers. You then rotate your eyes upward and inward to see the "spiritual eye" (a golden ring with a blue center and a white star). This is the physical evidence of Kriya’s success.