If you want to check your hardware information or more details about your servers to do some operation like changing or increasing physical resources, you need to power-off or reboot the server to check the POST Process information. However because of being operational, you may not be able to do that. So there is a good command to help you in this situation: smbiosDump.
For instance to check your CPU, memory, NIC and Power configurations:
smbiosDump | grep –A 4 ‘Physical Memory Array’#Total Slot and Max Size of Memory
smbiosDump | grep –A 12 ‘Memory Device’#Type and Size of each Slot