Hi, all<br>In CentOS 5.5 ,  value of BASH_VERSINFO[5]/MACHTYPE  is &quot;x86_64-redhat-linux-gnu&quot;(bash-3.2-32.el5.x86_64)<br>However,  &quot;x86_64-unknown-linux-gnu&quot; in CentOS 6.0/cr (bash-4.1.2-8.el6-x86_64)<br>
<br># cat /proc/cpuinfo<br>processor       : 0<br>vendor_id       : GenuineIntel<br>cpu family      : 6<br>model           : 23<br>model name      : Intel(R) Xeon(R) CPU           X3330  @ 2.66GHz<br>...<br><br>ps:  &quot;x86_64-redhat-linux-gnu&quot; in rhel 6.1(bash-4.1.2-8.el6-x86_64)<br>
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