I'm not that familiar with bash. I usually use tcsh, and in tcsh (and probably csh) if you define the alias cwdcmd, the command you aliased will be run after every cd command.
Y'all are being too literal. Historically, when someone uses the phrase "security through obscurity", they mean using using non-mainstream, or custom-made platforms. I.e., with regard to OS's, this means using something other than Windows, Unix/Linux, or Mac OS. Like my suggestion of OpenVMS...
Nah, usernames and passwords are faily common. I guess the ultimate security through obscurity would be to make your own OS. Then you can make one that doesn't use usernames or passwords. That is a much better example of STO (security through obscurity (look, I made a new TLA!)).
One other thing: Make sure your motherboard is not touching somewhere metal on your case. I'm not that familiar with your case, so I don't know if that's a problem.
Also, $80 for a PSU seems really cheap for an Opteron based system. I'd definitely check that out too.
Although they may...
For Win2K I used a little systray program called IconDesk to make my Desktop Icon labels transparent. It does other stuff, but making the desktop icon labels transparent was one of its options.
I like this answer the best. I was taught programming using Ada 83 on VAX VMS. There is nothing wrong with Ada. Try out GNAT, the free Ada 95 complier (you need to have gcc installed already).
I've heard of some students around here (New Orleans) taking college freshmen-level courses during their junior year in HS. Those courses counted as credit for their senior year in HS, and their first year of college at the same time, so they ended up skipping two years of school (senior year...