Linux Find Out Maximum RAM Supported By Server / BIOS

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How do I find out the maximum RAM supported by the Dell, HP, IBM, Oracle/Sun or Intel/AMD server on a Linux or Unix-like operating systems without rebooting the server or opening the server case (chassis)? How can I find find out maximum RAM supported by the Server BIOS and motherboard in Linux?

dmidecode -t memory

Either runas root or sudo dmidecode -t memory Should be within the first 10 lines