Get Hardware Details In Linux With ‘dmidecode’

Get Hardware Information In Linux With 'dmidecode'

dmidecode is a tool for dumping a computer’s DMI (some say SMBIOS ) table contents in a human-readable format. This table contains a description of the system’s hardware components as well as other useful pieces of information such as serial numbers and BIOS revision. Thanks to this table, you can retrieve this information without having to probe for the actual hardware. While this is a good point in terms of report speed and safeness, this also makes the presented information possibly unreliable.
​The DMI table doesn’t only describe what the system is currently made of, it also can report the possible evolutions (such as the fastest supported CPU or the maximal amount of memory supported).SMBIOS stands for System Management BIOS, while DMI stands for Desktop Management Interface. Both standards are tightly related and developed by the DMTF (Desktop Management Task Force).

As you run it, dmidecode will try to locate the DMI table. If it succeeds, it will then parse this table and display a list of records.

Let us look at a few dmidecode commands

Note: Some of these commands may require root privileges

Running basic dmidecode

Enter the following command in terminal –
dmidecode
Running basic dmidecode

To Get Physical Memory (RAM) Information Using Dmidecode

Enter the following command in terminal –
dmidecode -t 16
Get Physical Memory (RAM) Information

To Get BIOS information using dmidecode

Enter the following command in terminal –
dmidecode -t bios
Get BIOS information using dmidecode

To View Manufacturer, Model and Serial number of the equipment using dmidecode

Enter the following command in terminal –
dmidecode -t system
View Manufacturer, Model and Serial number of the equipment using dmidecode

To get Hardware Information about chassis

Enter the following command in terminal –
dmidecode -t chassis
get Hardware Information about chassis

Getting HW information about baseboard

Enter the following command in terminal –
dmidecode -t baseboard
Getting HW information about baseboard

To get 64-bit Memory Error information using type id along with dmidecode

Enter the following command in terminal –
dmidecode -t 33
Picture

All Dmi Types

​The following are all the available dmi types available for inquiry by dmidecode.
Type
Information
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 Extended Information
42
Management Controller Host Interface

​Note that keywords may be used in place of the type numbers. Keywords are not case sensitive
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

Usage in the following formats are all equivalent

  • dmidecode –type 0 –type 13
  • dmidecode –type 0,13
  • Dmidecode –type bios
  • Dmidecode — type BIOS

Conclusion

​Like I mentioned earlier, you can always run man dmidecode command to find out more about this command tool. I hope you find this simple tutorial quite useful. Share your thoughts with us in the comments. Thanks for reading.

Leave a Reply

Your email address will not be published. Required fields are marked *

linux system administration bootcamp