we can get minecraft full version (not pi edition) for free on a linux computer like raspberrypi,etc.

if we install the Minecraft jar ans run it it will ask you to enter your (Minecraft) Username and password.I did not have an account so i clicked on register and it took me to the Minecraft registering website it asked me my email and then asked me to verify my email.After that it told me to buy the product.(I thought it would be free) so i closed the chrome tab without completing the registration process.I then tried the same email and password i had written while i was trying to register and with my surprise it let me in without me buying the product.After that i was able to install any version of Minecraft I want.Please look at this issue as if i can do it anyone can do it.