dmidecode dum a computer’s DMI (SMBIOS)

sudo dmidecode -t 6 # Memory Module information

sudo dmidecode -t bios # Bios information

sudo dmidecode -t system # Hardware information

dmidecode is a tool for dumping a computer’s DMI (some say SMBIOS)

  • DMI TYPES
  • The SMBIOS specification defines the following DMI types:
  • 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 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

Each record has:

• A handle. This is a unique identifier, which allows records to reference each
other. For example, processor records usually reference cache memory records
using their handles.

• A type. The SMBIOS specification defines different types of elements a computer
can be made of. In this example, the type is 2, which means that the record
contains « Base Board Information ».

• A size. Each record has a 4-byte header (2 for the handle, 1 for the type, 1
for the size), the rest is used by the record data. This value doesn’t take
text strings into account (these are placed at the end of the record), so the
actual length of the record may be (and is often) greater than the displayed
value.

• Decoded values. The information presented of course depends on the type of
record. Here, we learn about the board’s manufacturer, model, version and ser‐
ial number.