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文章目录
前言dmidecode常用参数-t参数测试-q参数测试-s参数测试
总结
前言
如果是在windows系统下，查询电脑硬件会容易的多，可以通过电脑属性、计算机管理等多种图形化界面中查到，如果安装了各种电脑管家，那查询这类信息就更方便了，但如果在linux系统下通常要使用命令来解决，特别是查询服务器配置时，一般不会给服务器安装图形化界面，所以掌握必要的查询命令对于合理使用服务器资源很有必要。 dmidecode这个命令是偶然发现的，之前一般是查询电脑硬件资源的使用情况，比如 top 来看各个进程消耗的CPU和内存，使用 free -h 查询内存总体使用情况，最近电脑内存不太够了，想查询一下内存插槽状况，所以找到了这个命令 dmidecode，英文解释为 “DMI table decoder”，也就是DMI表解码器，可以理解为DMI信息的解释器。 在学习什么是DMI之前，先了解一下 SMBIOS 的概念，BOIS 是英文"Basic Input Output System"的缩略词，它是一组固化到计算机内主板上一个ROM芯片上的程序，它保存着计算机最重要的基本输入输出的程序、开机后自检程序和系统自启动程序，并可以从CMOS中读写系统设置的具体信息，为计算机提供最底层的、最直接的硬件设置和控制。 SMBIOS 全称是"System Management Basic Input/Output System"，表示系统管理基本输入输出系统，是主板或系统制造者以标准格式显示产品管理信息所需遵循的统一规范。 DMI 全称 “Desktop Management Interface”，用于帮助收集电脑系统信息的管理系统，DMI信息的收集必须在严格遵照SMBIOS规范的前提下进行，其设计适用于任何的平台和操作系统，充当了管理工具和系统层之间接口的角色。它建立了标准的可管理系统，更加方便了电脑厂商和用户对系统的了解，同时提供更为友好的用户工作环境。SMBIOS 和 DMI 都是由行业指导机构 “Desktop Management Task Force (DMTF)” 起草的开放性的技术标准。 常用参数 -q：显示会简单点，一些未知的、不活动的和oem指定的条目不显示，元数据和句柄引用被隐藏。-t: 一个非常重要的参数，用于显示指定类型的条目，可以使用数字，也可以使用一些代表数字组合的单词 DMI TYPES The SMBIOS specification defines the following DMI types: Type Information ──────────────────────────────────────────── 0 BIOS 1 System 2 Baseboard 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 Devices Extended Information 42 Management Controller Host Interface数字组合的单词代表： 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 Keywords are matched case-insensitively. The following command lines are equivalent: · dmidecode --type 0 --type 13 · dmidecode --type 0,13 · dmidecode --type bios · dmidecode --type BIOS -s：可以输出一些指定关键词相关信息，可用关键词如下： Valid string keywords are: bios-vendor bios-version bios-release-date system-manufacturer system-product-name system-version system-serial-number system-uuid system-family 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 -t参数测试以查看内存信息为例，可以使用 sudo dmidecode -t memory 命令查看内存所有信息，根据man手册知道这个命令包括5、6、16、17四项内容，但实际上我查询到的5、6为空，这个命令在我的电脑上只包含16、17两项 $ sudo dmidecode -t memory # dmidecode 3.2 Getting SMBIOS data from sysfs. SMBIOS 3.2.0 present. Handle 0x0002, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 32 GB Error Information Handle: Not Provided Number Of Devices: 2 Handle 0x0003, DMI type 17, 84 bytes Memory Device Array Handle: 0x0002 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: SODIMM Set: None Locator: ChannelA-DIMM0 Bank Locator: BANK 0 Type: DDR4 Type Detail: Synchronous Speed: 2667 MT/s Manufacturer: Micron Serial Number: 00000000 Asset Tag: None Part Number: 4ATF51264HZ-2G6E1 Rank: 1 Configured Memory Speed: 2667 MT/s Minimum Voltage: Unknown Maximum Voltage: Unknown Configured Voltage: 1.2 V Memory Technology: DRAM Memory Operating Mode Capability: Volatile memory Firmware Version: Not Specified Module Manufacturer ID: Bank 1, Hex 0x2C Module Product ID: Unknown Memory Subsystem Controller Manufacturer ID: Unknown Memory Subsystem Controller Product ID: Unknown Non-Volatile Size: None Volatile Size: 4 GB Cache Size: None Logical Size: None Handle 0x0004, DMI type 17, 84 bytes Memory Device Array Handle: 0x0002 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: SODIMM Set: None Locator: ChannelB-DIMM0 Bank Locator: BANK 2 Type: DDR4 Type Detail: Synchronous Speed: 2667 MT/s Manufacturer: Micron Serial Number: 00000000 Asset Tag: None Part Number: 4ATF51264HZ-2G6E1 Rank: 1 Configured Memory Speed: 2667 MT/s Minimum Voltage: Unknown Maximum Voltage: Unknown Configured Voltage: 1.2 V Memory Technology: DRAM Memory Operating Mode Capability: Volatile memory Firmware Version: Not Specified Module Manufacturer ID: Bank 1, Hex 0x2C Module Product ID: Unknown Memory Subsystem Controller Manufacturer ID: Unknown Memory Subsystem Controller Product ID: Unknown Non-Volatile Size: None Volatile Size: 4 GB Cache Size: None Logical Size: None可以直接指定单独的数字查询，比如查询内存阵列： $ sudo dmidecode -t 16 # dmidecode 3.2 Getting SMBIOS data from sysfs. SMBIOS 3.2.0 present. Handle 0x0002, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 32 GB Error Information Handle: Not Provided Number Of Devices: 2查询内存设备（内存条）信息： $ sudo dmidecode -t 17 # dmidecode 3.2 Getting SMBIOS data from sysfs. SMBIOS 3.2.0 present. Handle 0x0003, DMI type 17, 84 bytes Memory Device Array Handle: 0x0002 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: SODIMM Set: None Locator: ChannelA-DIMM0 Bank Locator: BANK 0 Type: DDR4 Type Detail: Synchronous Speed: 2667 MT/s Manufacturer: Micron Serial Number: 00000000 Asset Tag: None Part Number: 4ATF51264HZ-2G6E1 Rank: 1 Configured Memory Speed: 2667 MT/s Minimum Voltage: Unknown Maximum Voltage: Unknown Configured Voltage: 1.2 V Memory Technology: DRAM Memory Operating Mode Capability: Volatile memory Firmware Version: Not Specified Module Manufacturer ID: Bank 1, Hex 0x2C Module Product ID: Unknown Memory Subsystem Controller Manufacturer ID: Unknown Memory Subsystem Controller Product ID: Unknown Non-Volatile Size: None Volatile Size: 4 GB Cache Size: None Logical Size: None Handle 0x0004, DMI type 17, 84 bytes Memory Device Array Handle: 0x0002 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: SODIMM Set: None Locator: ChannelB-DIMM0 Bank Locator: BANK 2 Type: DDR4 Type Detail: Synchronous Speed: 2667 MT/s Manufacturer: Micron Serial Number: 00000000 Asset Tag: None Part Number: 4ATF51264HZ-2G6E1 Rank: 1 Configured Memory Speed: 2667 MT/s Minimum Voltage: Unknown Maximum Voltage: Unknown Configured Voltage: 1.2 V Memory Technology: DRAM Memory Operating Mode Capability: Volatile memory Firmware Version: Not Specified Module Manufacturer ID: Bank 1, Hex 0x2C Module Product ID: Unknown Memory Subsystem Controller Manufacturer ID: Unknown Memory Subsystem Controller Product ID: Unknown Non-Volatile Size: None Volatile Size: 4 GB Cache Size: None Logical Size: None一共有2个存储插槽，每个插槽上装有一个4G的内存条，最大支持32G内存 -q参数测试测试查询内存信息命令 sudo dmidecode -t 16 时可以看到开头有一些版本信息，查询其他类型时也包含这些信息 # dmidecode 3.2 Getting SMBIOS data from sysfs. SMBIOS 3.2.0 present.如果想屏蔽这些信息就可以使用 -q 参数，还可以屏蔽未知信息，可以对比一下： $ sudo dmidecode -t 16 -q Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 32 GB Number Of Devices: 2 $ sudo dmidecode -t 16 # dmidecode 3.2 Getting SMBIOS data from sysfs. SMBIOS 3.2.0 present. Handle 0x0002, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 32 GB Error Information Handle: Not Provided Number Of Devices: 2 -s参数测试查询BOIS信息: $ sudo dmidecode -s bios-vendor LENOVO $ sudo dmidecode -s bios-version N2SET18P (1.12 ) $ sudo dmidecode -s bios-release-date 04/01/2020查询系统信息： $ sudo dmidecode -s system-uuid a2d29e4c-2f08-11b2-a85c-8252d66b70f9 $ sudo dmidecode -s system-family ThinkPad X390 $ sudo dmidecode -s system-manufacturer LENOVO查询机箱主板信息 $ sudo dmidecode -s chassis-type Notebook $ sudo dmidecode -s chassis-version None $ sudo dmidecode -s chassis-serial-number PC1JX6X4 $ sudo dmidecode -s baseboard-manufacturer LENOVO $ sudo dmidecode -s baseboard-product-name 20SDA01ACD $ sudo dmidecode -s baseboard-version SDK0L77769 WIN查询处理器信息 $ sudo dmidecode -s processor-family Core i5 $ sudo dmidecode -s processor-version Intel(R) Core(TM) i5-10210U CPU @ 1.60GHz 总结 DMI 在遵守SMBIOS规范的前提下帮助收集电脑系统信息，适用于任何的平台和操作系统，可用 dmidecode 命令查询dmidecode 最重要的是 -t 参数，可以指定的特定数字类型0-42，可以使用具有组合命令的单词，这些预定单词不区分大小写： bios、system、baseboard、chassis、processor、memory、cache、connector、slot还有查询硬件使用情况的 top、htop、free 命令，查询静态信息的 lscpu、lsgpu、lsmem、lspci、lsusb命令等待挖掘 ==>> 反爬链接，请勿点击，原地爆炸，概不负责！ |
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