Two identical laptops with Ubuntu 14.04 (i386), but one fails to update...

[Robert Heller]

I manage two identicatial notebooks, both have Ubuntu 14.04 (i386) installed, 
but one is not picking up updates.  I run 'apt-get update;apt-get 
dist-upgrade' on it and it juts updates google-chrome, but nothing else.  
There are no errors.  The other one does its updates properly.  What should I 
be looking for?  Nothing *seems* to be wrong in /etc/apt as far as I can tell.

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