No, not a virus, a syntax error in a script. The line in the script reads
rm -rf /usr /lib/nvidia-current/xorg/xorg
There is a space between /usr and /lib/nvi... which does not belong there. As a result, you get
rm -rf // Translation, remove recursively and do not prompt for confirmation.
/usr // That's your usr directory, don't want to remove that, do you?
/lib/nvidia-current/xorg/xorg // This probably won't exist and be ignored
So what should have been a simple and straight forward operation turned into a disaster because
someone added an extra space into a command and then proceeded to compound the error
by not testing the script. And if I read correctly, the faulty script was present in two releases of
Moral: No matter how simple or routine you think that line of code you just wrote is, test, test, test.