Happy new year :D i have just installed centos 5.5 on my vmware to test my server,i found that i need nasm x64 to compile my assembly code,the yum database only has 0.98 version which does not support 64bit. the nasm version 2(rpm from offcial site) requires glibc 2.7, i know its a core component, but is there a way to upgrade it without break system? thanks for your time :D NamoBhagavan Max Haann