Hewlett-Packard is adding to its server arsenal with <A HREF="http://news.zdnet.com/2100-9584_22-5887799.html?tag=zdnn.alert">the purchase of blade pioneer RLX Technologies.</A> With the acquisition, HP gains the RLX Control Tower, a software suite designed for managing Linux-based blade server environments. Linux's penetration into the blade server market is greater than for the overall server market, analysts and computer makers say. The RLX Control Tower software will join a lineup of infrastructure management applications for Unix and Windows systems. Terms of the deal were not disclosed.