You'll want to read here:
http://www.utexas.edu/cc/unix/software/npasswd/

npasswd is a nice piece of security goodness.

On Thu, 19 Sep 2002, Roderick Ford wrote:

> I noticed that there was a sort of password analysis running during some "change 
> password" procedure, where it was telling the "goodness" of a password on a 
> scale.  If I entered a good mix of capitals and numbers and lowercase, of 
> course, the "goodness" was best.
> 
> My question is whether there is some command-line program that does this 
> analysis, or if there is a library, that the GUI (I think it was GTK or Gnome) 
> was using.
-- 
gary(AT)linuxforce.org
http://www.linuxchimp.com