About 2 months ago, I had a spare VPS at my host, Hetzner. So I decided to play with FreeBSD which was being offered for Hetzner servers and VPSes. That’s how the whole thing started.
First of all the basic difference between FreeBSD and GNU/Linux is that Linux is just the kernel and GNU is the userland. In layman’s terms, the hardware interface is called Linux, while the rest of the part: the shell, core tools, etc are GNU.It’s a piece from there, another from somewhere else and merging the whole thing into one collectively known as GNU/Linux. Linux itself cannot boot without GNU and GNU will not work without Linux (Yes, there is a GNU kernel project called GNU Hurd, but I don’t how far that went).
In FreeBSD, the whole thing is a complete unit. FreeBSD was derived from the original AT&T Unix and open sourced.
rest here