Achalananda (born Kedarnath Moulik in 1876, died 1947), popularly known as Kedar Baba, was a direct monastic disciple of Vivekananda and the founder of Ramakrishna Mission Home of Service, in Varanasi.

His father's name was Shambhu Chandra Moulik and his ancestral home was situated in the area called Sonarpura.

He lost his mother in early childhood and was brought up under the care and guidance of his grandfather, Ramachandra Moulik.

One of them was Charuchandra Das, who later joined the Ramakrishna Order and became a direct monastic disciple of Vivekananda and became known as Shubhananda.

Kedarnath, as per his own version, was greatly inspired by seeing the photograph of Ramakrishna which he installed in his library on the occasion of Niranjananda's visit and which he saw for the first time.

Kalyanananda, a direct disciple of Vivekananda, who had dedicated himself to service for humanity, visited Benares at this time.

[3] The service work by the group began with the treatment of a poor old lady on the verge of death lying on the roadside, who was given proper medical attention and other care.

After returning to Benares, Kedarnath, on advice from Niranjananda went to Jayrambati to meet Sarada Devi and spent about two months with her.

In his absence the Ramakrishna Mission Home of Service was established by his friends Charuchandra Das (Shubhananda) and Jamini Ranjan Majumdar, both disciples of Vivekananda.

[6] They took care of the hapless pilgrims who were often exploited by local priests and landlords and treated the sick, who otherwise had to die on the roadside.

[6] The organization's motto was serving God in every human being selflessly, in line with the practical Vedanta philosophy propounded by Vivekananda.

In 1902 Vivekananda had come to Benares and had inspired the group of young men further to dedicate themselves to serve the poor and needy sans any ego and desire.

A working committee, of which Kedarnath was also a member, was established under the presidency of Pramadadas Mitra, a great benefactor and well-wisher of Vivekananda.

At this time, the spiritual and the service work of Kedarnath had earned displeasure of his relatives and his father disowned him.

He stayed in Puri in company of Swami Brahmananda and in 1912 he visited Ramakrishna Mission Sevashrama Kankhal.

[15] When the holy mother Sri Sarada Devi visited the Ramakrishna Mission Home of Service, Achalananda showed her the hospital.

[17] The rest of his life was spent in spreading the ideals of Sri Ramakrishna and Swami Vivekananda and in pursuing spiritual austerities.