"FreeBSD is a UNIX-like OS that has been around since 1993. If
you're familiar with Linux or other UNIXes, you have most of the
knowledge required to try it out, but you will also notice a few
differences. Those familiar with the underpinnings of Mac OSX know
that it, too, is based on BSD.
"FreeBSD isn't as popular as the better-known Linux distros, but
it has a strong reputation for reliability and robustness, and it's
still in active development. For my first foray into FreeBSD, I
tried out the latest stable version (8.1), which was released
mid-July. Installation and Setup
"The homepage has a handful of install images, including a small
net install and a full DVD. I had some difficulty with the net
install, but I was successful with the DVD. (Note that if you're
trying out FreeBSD on a virtual machine, there is a known bug with
VirtualBox; Parallels seems to be OK.)"