Dmidecode, or Desktop Mangement Interface, is a very useful tool for finding out details of the system hardware on your Centos 6 or RHEL box.
Dmidecode outputs information about your hardware as recorded in the BIOS. You can also obtain the information about maximum supported system configuration. This includes model
name, serial number, BIOS version, asset tag and other
details depending on the
manufacturer. This will often include usage status for the CPU sockets,
expansion slots (e.g. AGP, PCI, ISA) and memory module slots, and the
list of I/O ports (e.g. serial, parallel, USB). Important to note is that it does not scan your hardware but reports what information the bios holds on it. It should be run as root user.
It is in the base repo so just
# yum -y install dmidecode
# dmidecode --string baseboard-manufacturer
Dell Inc.
# sudo dmidecode --string processor-manufacturer
Intel
# dmidecode --string processor-frequency
1800 MHz
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
Or you can specify individual components using -t or --type or even a comma separated list of type numbers.
# dmidecode -t processor (edited output)
Version: Intel(R) Celeron(R) CPU 430 @ 1.80GHz
Voltage: 0.0 V
External Clock: 200 MHz
Max Speed: 4000 MHz
Current Speed: 1800 MHz
Status: Populated, Enabled
Upgrade: ZIF Socket
L1 Cache Handle: 0x000A
L2 Cache Handle: 0x000B
L3 Cache Handle: Not Provided
Serial Number:
Asset Tag:
Part Number:
Core Count: 1
Core Enabled: 1
Thread Count: 1
Characteristics:
64-bit capable
# dmidecode -t memory
Handle 0x0027, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0024
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 1024 MB
Form Factor: DIMM
Set: None
Locator: DIMM3
Bank Locator:
Type: DDR2
Type Detail: Synchronous
Speed: 667 MHz
Manufacturer: 0000000000000000
Serial Number: 071002C5
Asset Tag: 000000
Part Number: 128X64M-80E
# dmidecode -t connector (edited output)
Port Connector Information
Internal Reference Designator: Not Specified
Internal Connector Type: None
External Reference Designator: VIDEO
External Connector Type: DB-15 female
Port Type: Video Port
Handle 0x001C, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator: Not Specified
Internal Connector Type: None
External Reference Designator: AUDIO
External Connector Type: None
Port Type: Audio Port
Handle 0x001D, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator: Not Specified
Internal Connector Type: None
External Reference Designator: ETHERNET
External Connector Type: RJ-45
Port Type: Network Port
Each keyword corresponds to a list of type numbers which can also be used individually.
Commonly used parameters as a string are
bios – info about your bios.system – info about the system hardware.baseboard – info on the mother board.chassis – info on what the system is made up of.processor – processor info.memory – memory info.cache – info on the CPU cache.connector – output interfaces. USB, firewire, ethernet etc.slot – system bus information, voltages present, supplied etc.
The following additional numbered types are available
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
# dmidecode -t 4
Is the same output as
# dmidecode -t processor
Pipe the information using head
# dmidecode -t 4 | head -26
SMBIOS 2.5 present.
Handle 0x0004, DMI type 4, 40 bytes
Processor Information
Socket Designation: Socket 775
Type: Central Processor
Family: Celeron
Manufacturer: Intel
ID: 61 06 01 00 FF FB EB AF
Signature: Type 0, Family 6, Model 22, Stepping 1
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)
$ man dmidecode
$ dmidecode -h
for additional details.Labels: Centos 6, Dmidecode, RHEL