How to Get Hardware Information with Dmidecode Command on Linux?

We can use Dmidecode command to retrieve hardware information of any Linux system. Suppose if we want to upgrade a system we need to gather information like Memory, BIOS and CPUetc. With help of Dmidecode command we will come to know the details without opening system chasis. Dmidecode command works for RHEL/CentOS/Fedora/Ubuntu Linux.

Sudo dmidecode   -t  system   (-t  ---> type)

Sudo dmidecode -t bios

Sudo dmidecode -t  6

  Type   Information
----------------------------------------
0  BIOS
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