In a Linux operating system all each hardware device is represented as a file. The device can be controlled by simply reading and writing into that file. The hardware of an operating system is on the one side and the user trying to access the hardware is on the other side, and in between them there might be several layers of applications running which communicates each other using inter process communication methods. This project demonstrates how to control a process which can turn on and off the LEDs of the Raspberrypi with the help of another process by writing into a pipe file. The Raspberrypi is a mini computer which can be used to learn and experiment the concept and working of an Operating System. The Raspberry pi is a device which uses the Broadcom controller chip which is a SoC (System on Chip). This SoC has the ARM11 processor which runs on 700 MHz at its core.