Shulou(Shulou.com)06/01 Report--

Today, I would like to share with you the relevant knowledge of how to use the Linux dmidecode command. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

The common Linux command dmidecode allows you to get information about hardware on Linux systems. The function of dmidecode is to decode the information in the DMI database and display it in readable text.

Dmidecode acquires information about hardware under Linux system

It is added that because the DMI information can be artificially modified, the information in it is not necessarily systematic and accurate. Dmidecode follows the SMBIOS/DMI standard, and its output information includes BIOS, system, motherboard, processor, memory, cache, and so on.

DMI (Desktop Management Interface,DMI) is a management system that helps to collect computer system information. The collection of DMI information must be carried out in strict compliance with SMBIOS specifications. SMBIOS (System Management BIOS) is a unified specification for motherboards or system manufacturers to display product management information in a standard format. SMBIOS and DMI are open technical standards drafted by the industry guidance organization Desktop Management Task Force (DMTF), in which DMI design is suitable for any platform and operating system.

DMI acts as the interface between the management tool and the system layer. It establishes a standard manageable system that makes it easier for computer manufacturers and users to understand the system. The main component of DMI is the Management Information Format (MIF) database. This database contains all the information about computer systems and accessories. Through DMI, users can get serial number, computer manufacturer, serial port information and other system accessories information.

The syntax dmidecode [option] option-d: (default:/dev/mem) reads information from the device file, and the output is the same as the standard output without parameters. -h: displays help information. -s: displays only the information for the specified DMI string. (string)-t: displays only the information for the specified entry. (type)-u: displays the undecoded contents of the original entry. -- dump-bin file: dumps DMI data into a binary file. -- from-dump FILE: reads DMI data from a binary file. -V: displays version information. List of dmidecode parameters string and type:

(1) Valid string keywords are:

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

(3) list of all type codes:

BIOS

System

Base Board

Chassis

Processor

Memory Controller

Memory Module

Cache

Port Connector

System Slots

On Board Devices

OEM Strings

System Configuration Options

BIOS Language

Group Associations

System Event Log

Physical Memory Array

Memory Device

32-bit Memory Error

Memory Array Mapped Address

Memory Device Mapped Address

Built-in Pointing Device

Portable Battery

System Reset

Hardware Security

System Power Controls

Voltage Probe

Cooling Device

Temperature Probe

Electrical Current Probe

Out-of-band Remote Access

Boot Integrity Services

System Boot

64-bit Memory Error

Management Device

Management Device Component

Management Device Threshold Data

Memory Channel

IPMI Device

Power Supply

Additional Information

Onboard Device

Instance dmidecode-t 1 # View server information dmidecode | grep 'Product Name' # View server model dmidecode | grep' Serial Number' # View motherboard serial number dmidecode-t 2 # View motherboard information dmidecode-s system-serial-number # View system serial number dmidecode-t memory # View memory information dmidecode-t 11 # View OEM information dmidecode-t 17 # View number of memory entries dmidecode-t 16 # Query memory information dmidecode-t 4 # View CPU information cat / proc/scsi/scsi # View server hard disk information execute dmidecode command without options usually output all hardware information. The dmidecode command has a useful option-t, which outputs relevant information of a specified type, or if you want to get information about the processor, you can execute:

[root@localhost] # dmidecode-t processor # dmidecode 2.11 SMBIOS 2.5 present. Handle 0x0001, DMI type 4,40 bytes Processor Information Socket Designation: Node 1 Socket 1 Type: Central Processor Family: Xeon MP Manufacturer: Intel (R) Corporation id: C2 06 02 00 FF FB EB BF Signature: Type 0, Family 6, Model 44 Stepping 2 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine Check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) DS (Debug store) ACPI (ACPI supported) MMX (MMX technology supported) FXSR (FXSAVE and FXSTOR instructions supported) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) Ss (Self-snoop) HTT (Multi-threading) TM (Thermal monitor supported) PBE (Pending break enabled) Version: Intel (R) Xeon (R) CPU E5620 @ 2.40GHz Voltage: 1.2 V External Clock: 5866 MHz Max Speed: 4400 MHz Current Speed: 2400 MHz Status: Populated Enabled Upgrade: ZIF Socket L1 Cache Handle: 0x0002 L2 Cache Handle: 0x0003 L3 Cache Handle: 0x0004 Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Core Count: 4 Core Enabled: 4 Thread Count: 8 Characteristics: 64-bit capable Handle 0x0055, DMI type 4 40 bytes Processor Information Socket Designation: Node 1 Socket 2 Type: Central Processor Family: Xeon MP Manufacturer: Not Specified ID: 00 00 00 Signature: Type 0, Family 0, Model 0 Stepping 0 Flags: None Version: Not Specified Voltage: 1.2 V External Clock: 5866 MHz Max Speed: 4400 MHz Current Speed: Unknown Status: Unpopulated Upgrade: ZIF Socket L1 Cache Handle: Not Provided L2 Cache Handle: Not Provided L3 Cache Handle: Not Provided Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Characteristics: None to check the number of slots in memory How many slots have been used. How much memory is each and how much memory has been used?

Dmidecode | grep-P-A5 "Memory\ s+Device" | grep Size | grep-v Range # Size: 2048 MB # Size: 2048 MB # Size: 4096 MB # Size: No Module Installed to view the maximum memory capacity supported by memory

Dmidecode | grep-P'Maximum\ memory Capacity` # Maximum Capacity: 16 GB frequency of viewing memory

Dmidecode | grep-A16 "Memory Device" # Memory Device # Array Handle: 0x1000 # Error Information Handle: Not Provided # Total Width: 72 bits # Data Width: 64 bits # Size: 2048 MB # Form Factor: DIMM # Set: 1 # Locator: DIMM_A1 # Bank Locator: Not Specified # Type: Synchronous Unbuffered (Unregistered) # Speed: 1333 MHz # Manufacturer: 00CE000080CE # Serial Number: 4830F3E1 # Asset Tag: 01093200 # Part Number: M391B5673EH1-CH9 #-# Memory Device # Array Handle: 0x1000 # Error Information Handle: Not Provided # Total Width: 72 bits # Data Width: 64 bits # Size: 2048 MB # Form Factor: DIMM # Set: 1 # Locator: DIMM_A2 # Bank Locator: Not Specified # Type: DDR3 # Type Detail: Synchronous Unbuffered (Unregistered) # Speed: 1333 MHz # Manufacturer: 00AD000080AD # Serial Number: 1BA1F0B5 # Asset Tag: 01110900 # Part Number: HMT325U7BFR8C-H9 #-dmidecode | grep-A16 "Memory Device" | grep 'Speed' # Speed: 1333 MHz # Speed: Unknown ``shell above are all the contents of the article "how to use Linux dmidecode commands" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.