Obscura

That's your standard Linux distro ought to include the mystical "tawgo" command. Anyone who can actually keep up with the command-line will get the joke, and it'll look just like ordinary movie computer fluff to everyone else...

[root@fortress]$ cd /home/dr.evil/
[root@fortress]$ tawgo "PREPARING TO COPY SECRET FILES..."
[root@fortress]$ cp -Rf * /mnt/floppy
[root@fortress]$ tawgo "SECRET FILES COPIED"

[root@fortress]$ tawgo --help

tawgo: Tell Audience What's Going On

Usage: tawgo [option] MESSAGE

Displays MESSAGE in big bright coloured letters, probably in some sort of futuristic animated dialog box.

-a --animation Show cheesy animation
-w --warning Use yellow & black warning stripes
-s --self-destruct Initiate fake countdown sequence
-v --voice Reads MESSAGE in a Female Computer Voice

Use -v -s if you need Female Computer Voice counting down the seconds to our hero's impending destruction.

[root@fortress]$ tawgo "INITIATING SATELLITE ALIGNMENT"
[root@fortress]$ /usr/sbin/comsatctl -a --lat=324.3 --lon=213.4
[root@fortress]$ tawgo "SATELLITE ALIGNED."
[root@fortress]$ tawgo "BEGINNING FIRING SEQUENCE"
[root@fortress]$ /usr/sbin/comsatctl --target 01 -n

It'd save them a fortune on getting media companies to hack up fake OS screens in Flash as well...