An indian naga sadhu (Sanskrit, m, साधु, sadhu, lit:. "Good person") is a Hindu ascetic or yoga practitioner (yogi) that follows the first three Hindu goals of life: kama (pleasure), artha (wealth), dharma (right action) provided. A sadhu is fully committed to achieving moksha spiritual liberation through meditation.
The sadhus in Hinduism come from the former Sramana's, ajivaka and paribbajaka's who lived in the time of the Buddha, groups of ascetics who are not the teachings of Brahmanism adhered: Brahmanism had in fact no monks or ascetics. There is a great diversity of ideas, beliefs and practices that adhere to the sadhus. In the Pali language of Theravada Buddhism, including in Sri Lanka, the word sadhu (sadhu) means it's good, I'm happy with it.