As other people have mentioned here: why bother with Parallels at all? Mac OS X _is_ a UNIX system. You can't really mess it up unless you delve into kernel development. But somehow I get the feeling that you're not quite ready for that yet.
So here's some UNIXy things for you to start learning in Mac OS X:
Command-line? Just run /Applications/Utilities/Terminal and voila, there's a UNIX command-prompt (BASH shell) in all it's glory.
Want to do UNIX programming? Grab the Apple developer tools (XCode tools), your favorite UNIX programming book, and have at it.
X Windows? It may already be installed in /Applications/Utilities/X11, but if not, just pop in your Mac OS X install DVD, double-click "Optional Installs", and select X11. The X11 development package is also bundled with the Apple developer tools.
Perl, Python, Ruby, Java, PHP, cc/gcc, make, autoconf, m4, lex/flex, yacc/bison, sed, grep, man, UNIX filesystem structure (/dev, /etc, /usr, /var, /tmp, user home directories), open source kernel (Darwin)? All bundled with Mac OS X and the XCode Developer Tools.
I think that just about covers everything which defines a UNIX system.
But don't let all the buzzwords and acronyms hold you back -- go on and learn what UNIX really is and the reason why people love/hate it so much.
Last edited: May 24, 2006