Originally published at: https://www.cyberciti.biz/tips/querying-dumping-bios-from-linux-command-prompt.html
You can use get BIOS and hardware information with dmidecode command on Linux. No need to open your server or reboot the box. The dmidecode is a command line utility to parses the BIOS memory and prints information about all structures. You can find out more information about your hardware such as:
IPMI Device
Type of memory and speed
Chassis Information
Temperature Probe
Cooling Device
Electrical Current Probe
Processor and Memory Information
Serial numbers
BIOS version
PCI / PCIe Slots and Speed
Much more…