# uname -a
Linux localhost.localdomain 2.6.18-164.el5PAE #1 SMP Thu Sep 3 04:10:44 EDT 2009 i686 i686 i386 GNU/Linux
(查看当前操作系统内核信息)
# lsb_release -a
LSB Version: :core-3.1-ia32:core-3.1-noarch:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: CentOS
Description: CentOS release 5.4 (Final)
Release: 5.4
Codename: Final
(查看当前操作系统发行版信息)
# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
8 Intel(R) Xeon(R) CPU E5620 @ 2.40GHz
(8个逻辑CPU, CPU型号)
# cat /proc/cpuinfo | grep physical | uniq -c
8 physical id : 0
(说明实际上是一颗4核的CPU)
# getconf LONG_BIT
32
(说明当前CPU运行在32bit模式下, 但不代表CPU不支持64bit)
# cat /proc/cpuinfo | grep flags | grep ‘ lm ‘ | wc -l
4
(结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)
CentOS查看CPU信息、位数、多核信息
原文：http://www.cnblogs.com/irisrain/p/4201938.html
