linux中使用dmidecode查看硬件信息

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在 linux 系统环境下，可以使用 dmicode 命令查看硬件设备的详细信息，我的系统是 CentOS 7，已经测试可以用。

具体命令格式为：dmidecode -t typecode

其中 typecode 是设备类型代码，具体代码如下：

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

比如，

使用 dmidecode -t 1 可以查看主板信息 (制造商、型号、序列号等等）

使用 dmidecode -t 4 可以查看 CPU 信息 (CPU 数目、型号、大小、频率等等）

使用 dmidecode -t 17 可以查看内存信息 ( 插槽数目、内存类型、大小、频率等等）

硬盘信息的查看可以通过 smartctl -i /dev/sda

其中 /dev/sda 为硬盘，以下是我电脑中的硬盘信息：

smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.10.0-229.7.2.el7.x86_64] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda 7200.12
Device Model: ST3500418AS
Serial Number: 6VM48CWM
LU WWN Device Id: 5 000c50 01875d710
Firmware Version: CC35
User Capacity: 500,107,862,016 bytes [500 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 7200 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 2.6, 3.0 Gb/s
Local Time is: Wed Jul 15 09:23:19 2015 CST

==> WARNING: A firmware update for this drive may be available,
see the following Seagate web pages:
http://knowledge.seagate.com/articles/en_US/FAQ/207931en
http://knowledge.seagate.com/articles/en_US/FAQ/213891en

SMART support is: Available – device has SMART capability.
SMART support is: Enabled

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