How to Upgrade tzdata and tzcode into a unix server

I would like to upgrade the tzdata and tzcode automatically into my server for each upgrade of the olson tz data to prevent from bad local_time calculation. I would like to make my server know that a new release of tzdata/tzcode is available and make it load the new tzdata release and override the previous. Please, let me know how to do that ? -- François REYGAGNE. Software Architect. opt[e]way S.A., 2881 route des Crêtes, BP308 06906 Sophia Antipolis Cedex, FRANCE tél: +33 (0)4 92 95 27 01 http://www.opteway.com