dmidecode: Show system information in Linux

If you want to check system information in Linux (without UI), especially Linux server. We will instruct you to use dmidecode command .

Install dmidecode

On CentOS/RHEL:

$ sudo yum install dmidecode

On Ubuntu/Debian:

$ sudo apt update -y
$ sudo apt install -y dmidecode

Check dmidecode version:

$ dmidecode -V
2.11

Show system infromation of server

This command will output Linux server information, such as: Product Name, Manufacturer, Serial Number, UUID.

[user@hostname] $ dmidecode -t1
# dmidecode 2.11
SMBIOS 2.7 present.

Handle 0x0100, DMI type 1, 27 bytes
System Information
    Manufacturer: Dell Inc.
    Product Name: PowerEdge R720xd
    Version: Not Specified.
    Serial Number:
    UUID: 4C4C4544-042XXXXX
    Wake-up Type: Power Switch
    SKU Number: Not Specified
    Family: Not Specified

Show BIOS information

$ dmidecode -t0
OR
$ dmidecode -t bios

Show System Cache information

$ dmidecode -t7
OR
$ dmidecode -t cache

Show RAM information

It can show you about RAM: speed (bus), type, capacity.

$ dmidecode -t17

Appendix

You can change value of flag -t within command with below value:

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	Onboard 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	Bult-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	Memmory Channel
38	IPMI Device
39	Power Supply
40	Additional Information
41	Onboard Devices Extended Information
42	Management Controller Host Interface