how do the prisoners who are already in the barracks treat the newcomers? what are they ordered to do at the barracks?

At the barracks, veteran prisoners began to beat the new arrivals and told them to get undressed. The new prisoners threw their clothes into a huge pile. SS officers selected strong men who were taken to work in the crematories. The new arrivals were then taken to the barber, where all their body hair was shaved off.