https://www.jianshu.com/p/aaeb10b667e5
一、DMI簡介：
DMI (Desktop Management Interface, DMI)就是幫助收集電腦系統信息的管理系統，DMI信息的收集必須在嚴格遵照SMBIOS規範的前提下進行。 SMBIOS(System Management BIOS)是主板或系統製造者以標準格式顯示產品管理信息所需遵循的統一規範。SMBIOS和DMI是由行業指導機構Desktop Management Task Force (DMTF)起草的開放性的技術標準，其中DMI設計適用於任何的平臺和操作系統。
DMI充當了管理工具和系統層之間接口的角色。它建立了標準的可管理系統更加方便了電腦廠商和用戶對系統的瞭解。DMI的主要組成部分是Management Information Format (MIF)數據庫。這個數據庫包括了所有有關電腦系統和配件的信息。通過DMI，用戶可以獲取序列號、電腦廠商、串口信息以及其它系統配件信息。
二、dmidecode的作用是將DMI數據庫中的信息解碼，以可讀的文本方式顯示。
命令用法示例：
1、查看服務器型號：dmidecode | grep 'Product Name'
2、查看主板的序列號：dmidecode |grep 'Serial Number'
3、查看系統序列號：dmidecode -s system-serial-number
4、查看內存信息：dmidecode -t memory
5、查看OEM信息：dmidecode -t 11
三、dmidecode參數string及type列表
（1）Valid string keywords are:
dmidecode -s bios-vendor
bios-vendor
bios-version
bios-release-date
system-manufacturer
system-product-name
system-version
system-serial-number
system-uuid
baseboard-manufacturer
baseboard-product-name
baseboard-version
baseboard-serial-number
baseboard-asset-tag
chassis-manufacturer
chassis-type
chassis-version
chassis-serial-number
chassis-asset-tag
processor-family
processor-manufacturer
processor-version
processor-frequency
（2）Valid type keywords are:
bios
system
baseboard
chassis
processor
memory
cache
connector
slot
Dmi Types
The SMBIOS specification defines the following DMI types:
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