Hi, all In CentOS 5.5 , value of BASH_VERSINFO[5]/MACHTYPE is "x86_64-redhat-linux-gnu"(bash-3.2-32.el5.x86_64) However, "x86_64-unknown-linux-gnu" in CentOS 6.0/cr (bash-4.1.2-8.el6-x86_64) # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Xeon(R) CPU X3330 @ 2.66GHz ... ps: "x86_64-redhat-linux-gnu" in rhel 6.1(bash-4.1.2-8.el6-x86_64) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-devel/attachments/20110930/90fe295f/attachment-0006.html>