Those are some pretty slick tricks. Too bad the author didn't know how to craft his own ls, cat and other commands using bash builtins and functions, as I wrote here: <a href="http://www.h-i-r.net/2009/08/cratered-your-linux-box-here-are-some.html" rel="nofollow">http://www.h-i-r.net/2009/08/cratered-your-linux-box-here-ar...</a><p>I'm definitely adding some of this to my little book of tricks!