Linux下查看机器信息

1. 查看物理CPU的个数

#cat /proc/cpuinfo |grep "physical id"|sort |uniq|wc -l
 1

2. 查看逻辑CPU的个数

#cat /proc/cpuinfo |grep "processor"|wc -l
 8

3. 查看CPU是几核

#cat /proc/cpuinfo |grep "cores"|uniq
 cpu cores : 4

4. 查看CPU的主频

#cat /proc/cpuinfo |grep MHz|uniq
 cpu MHz  : 1600.000

其他信息

# uname -a
Linux 54acm 2.6.32-25-generic-pae #44-Ubuntu SMP Fri Sep 17 21:57:48 UTC 2010 i686 GNU/Linux
(查看当前操作系统内核信息)
# cat /etc/issue 
Ubuntu 10.04 LTS
(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
(看到有8个逻辑CPU, 也知道了CPU型号)
 
# cat /proc/cpuinfo | grep physical | uniq -c
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
      1 physical id : 1
      1 address sizes : 40 bits physical, 48 bits virtual
 
(说明实际上是两颗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
8
(结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)

如何获得CPU的详细信息:
linux命令:cat /proc/cpuinfo
用命令判断几个物理CPU,几个核等:
逻辑CPU个数:
# cat /proc/cpuinfo | grep “processor” | wc -l
物理CPU个数:
# cat /proc/cpuinfo | grep “physical id” | sort | uniq | wc -l
每个物理CPU中Core的个数:
# cat /proc/cpuinfo | grep “cpu cores” | wc -l
是否为超线程?
如果有两个逻辑CPU具有相同的”core id”,那么超线程是打开的。
每个物理CPU中逻辑CPU(可能是core, threads或both)的个数:

# cat /proc/cpuinfo | grep "siblings"
siblings : 8
1.查看CPU信息命令
cat /proc/cpuinfo
2.查看内存信息命令
cat /proc/meminfo
3.查看硬盘信息命令
fdisk -l

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