There are a couple of commands that can find out your machine’s motherboard manufacturer,name and other informations,list CPU ID and serial number,BIOS information.
This command gives your CPU ID:


sudo dmidecode -t 4 | grep ID

and serial number:


sudo dmidecode | grep Serial


The CPU information:


sudo dmidecode -t 4


BIOS Information:


sudo dmidecode -t 0


Motherboard information:


sudo dmidecode -t 2


and OEM:


sudo dmidecode -t 11