BLAS/Lapack are efficient matrix math libraries. The following instructions explains how to install them for Amazon EC2 (Ubuntu maverick version, and Amazon Linux). It++ (itpp) is a popular c++ wrapper for blas/lapack. DISLAIMER: The below instructions are for 64 bit machines. For 32 bit machines follow other instructions: http://bickson.blogspot.com/2011/06/graphlab-pmf-on-32-bit-linux.html FOR L