Linux下查看硬件信息

      写这篇文档的时候我是多么的郁闷啊，刚买的6条4G的金士顿内存用不了啊，和我现有的机器不兼容！
由于提前没有收集内存的信息，所以导致这样的后果，吃一堑长一智吧！

      简单的整理一下Linux下看看硬件信息的方法。主要是以介绍dmidecode命令为主。

dmidecode： DMI table decoder

1、 -s  选项对应的参数：
           （具体参数对应的信息不解释了！）
           bios-vendor, bios-version, bios-release-date,
           system-manufacturer, system-product-name,
           system-version,  system-serial-number, 
           system-uuid,  baseboard-manufacturer, 
           base-board-product-name,  baseboard-version, 
           baseboard-serial-number, baseboard-asset-tag,
           chassis-manufacturer, chassis-type, chassis-version,
           chas-sis-serial-number, chassis-asset-tag,
           processor-family, processor-manufacturer,
           processor-version, processor-frequency.

2、-t  选项对应的参数：
          （具体参数对应的信息不解释了！）
          bios, system, baseboard, chassis, processor, memory, cache, connector, slot.

3、所有选项对应的编号：
     Type   Information
       ----------------------------------------
          0   BIOS
          1   System
          2   Base Board
          3   Chassis
          4   Processor
          5   Memory Controller
          6   Memory Module
          7   Cache
          8   Port Connector
          9   System Slots
         10   On Board Devices
         11   OEM Strings
         12   System Configuration Options
         13   BIOS Language
         14   Group Associations
         15   System Event Log
         16   Physical Memory Array
         17   Memory Device
         18   32-bit Memory Error
         19   Memory Array Mapped Address
         20   Memory Device Mapped Address
         21   Built-in Pointing Device
         22   Portable Battery
         23   System Reset
         24   Hardware Security
         25   System Power Controls
         26   Voltage Probe
         27   Cooling Device
         28   Temperature Probe
         29   Electrical Current Probe
         30   Out-of-band Remote Access
         31   Boot Integrity Services
         32   System Boot
         33   64-bit Memory Error
         34   Management Device
         35   Management Device Component
         36   Management Device Threshold Data
         37   Memory Channel
         38   IPMI Device
         39   Power Supply
         40   Additional Information
         41   Onboard Device

5、-t 选项对应的KeyWord参数可以用类型编号代替：
       Keyword     Types
       ------------------------------
       bios                0, 13
       system           1, 12, 15, 23, 32
       baseboard     2, 10, 41
       chassis           3
       processor      4
       memory         5, 6, 16, 17
       cache             7
       connector     8
       slot                 9
       例如：
        dmidecode -t bios -t BIOS Language 可以用 dmidecode -t 0 -t 13代替。

6、查看内存频率信息：
        dmidecode -t memory | grep --color "^Speed"

7、查看CPU信息：
        dmidecode -t processor

8、查看CPU是否支持虚拟化：
        dmidecode -t processor | grep "VME"
        如果出现“VME (Virtual mode extension)”代表支持虚拟化

以上命令在RHEL 6.0上测试通过