Thanks
I like Ubuntu Linux myself for a unix-type platform.
Even better, you can download the ISO file and use any number of utilities to install that onto a thumb drive creating a bootable thumb drive. Then if your BIOS is correctly configured (or you hit the right magic key combo on startup) you can boot from the thumb drive and try out Linux without committing to an install. Of course it will be a little slow running from the thumb drive, but you'll get to try it out.