Determine Motherboard Model In Linux Using dmidecode

dmidecode -t 2

Would yield something like:

# dmidecode 2.11
SMBIOS 2.5 present.

Handle 0x0200, DMI type 2, 9 bytes
Base Board Information
        Manufacturer: Dell Inc.
        Product Name: 0M788G
        Version: A01
        Serial Number: ..CN701638C400DA.
        Asset Tag: Not Specified