I do not understand what going on recently in site.

I suppose that site is to help people.

I do not understand why people close questions.

If you will continue to close questions people will go to other places.

http://serverfault.com/questions/744213/how-to-configure-freeradius-to-support-two-factor-auth

Added

Dear EEEA, I was required only to put the link that point to tutorial. Sometime just put the link in the answers help a lot!!! Thank for one kind person that did it!!!

It will help me and for future people.

So, what is more important to you: to help to people or to follow rules that were added recently?

You wrong about the assumption that I give up.