linux命令dmidecode

dmidecode是读取DMI的信息显示给大家的。

[root@mail proc]# dmidecode --help

Usage: dmidecode [OPTIONS]

Options are:

-d, --dev-mem FILE Read memory from device FILE (default: /dev/mem)

-h, --help Display this help text and exit

-q, --quiet Less verbose output

-s, --string KEYWORD Only display the value of the given DMI string

-t, --type TYPE Only display the entries of given type

-u, --dump Do not decode the entries

-V, --version Display the version and exit

以上是它的帮助信息，最有用的当然是参数-t了，它后面可跟的参数有：

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 -bit Memory Error

34 Management Device

35 Management Device Component

36 Management Device Threshold Data

37 Memory Channel

38 IPMI Device

39 Power Supply

类型归纳一下如下：

bios 0, 13

system 1, 12, 15, 23, 32

baseboard 2, 10

chassis 3

processor 4

memory 5, 6, 16, 17

cache 7

connector 8

slot 9

比如查看CPU信息：

dmidecode -t 4 或者 dmidecode -t porcessor

两者的功能是一样的，查看内存 dmidecode -t 5 或 dmidecode -t memory

最常用的可能就是这两个指令了，尤其是查看内存，dmidecode -t memory会显示哪个插槽插了内存，容量多大的以及频率等信息。