Learning new installations of Oracle VirtualBox and then Installed UBUNTU 32 Bit in VirtualBox and installed DOCKER in my home pc. Docker was not easily installed, it stalled my progress for some time and then tried with new Ubutu 64 bit. This time i disconnected net as it hanged when connected to internet. 64 bit installed successfully. And now browsed through various internet sites and found the solution to install docker. Now in Docker hub.