how to identify 32 vs 64 bit CPU?

[Chris Jones]

> How about uname?  `uname -a` gives all of it.  See `man uname` for subsets
> and the ordering of the "-a" output.  If you need more than just x86, I
> think any solution will be a bit involved.

AFAIK, uname only tells you what you are running, not what you *could* 
run. I.e. you couldn't tell the diffrence between a 32 bit os on a 64 
bit capable machine or a 32 bit only machine.

Chris