dmidecode command helps to extract hardware and other useful pieces of information like Make and Model of System, memory, BIOS, CPU, Chassis, Serial no.of the System etc. dmidecode tool is to dump DMI table contents in a human readable format. SMBIOS and DMI both standards are related and developed by the DMTF (Desktop Management Task Force). dmidecode will try to locate the DMI table, it will try to read the DMI table from sysfs and next try reading directly from memory if sysfs access failed. in this post, we are going to see some of the useful command with examples.
1. Following are the DMI types available with dmidecode command
The SMBIOS specification defines the following DMI types:
5 Memory Controller
6 Memory Module
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
Example: To get a system information, we are going to use Keyword instead of Types.
# dmidecode -t system
2. To display chassis details
With dmidecode command you can use keyword or type id to get system information. Following command we are using keyword instead of type id.
# dmidecode -t chassis
3. Get BIOS related information.
Following command will display handful of BIOS related details.
# dmidecode -t bios
4. To display system details
With dmidecode command you can use both keyword or type id to get system information. Following command we are using type id instead of keyword. In below command type id “1” is system which is shown in above DMI types point no. 1
# dmidecode -t 1
5. To Find system serial no.
Following command will shows system serial no.
# dmidecode -s system-serial-number
6. To display system manufacturer
Following command will shows you manufacturer of the system .
# dmidecode -s system-manufacturer
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7. To display product or model type of the system .
Below command will shows you the product or model type of the system. Option “-s” is
# dmidecode -s system-product-name
8. To Find CPU or processor details
Run below command extract physically installed RAM details like part number, type, speed, serial no. etc.
# dmidecode -t 17
10. To get the cache information of the system.
# dmidecode -t cache
Conclusion: In this tutorial, we have seen how we an extract hardware info using dmidecode command in Linux. To know more about it do man dmidecode from command prompt. Big thanks for reading all the way to the end. Please share it with Your Friends & Help Someone… and also Like Our Facebook Page. Let me hear your thoughts in the comments below!