lists all your hardware...how much memory do I physically recognize? (CENTOS)
dmidecode -t processor
# dmidecode 2.11
SMBIOS 2.7 present.
Handle 0x0004, DMI type 4, 42 bytes
Processor Information
Socket Designation: CPU 1
Type: Central Processor
Family: Core i5
Manufacturer: Intel
ID: A7 06 02 00 FF FB EB BF
Signature: Type 0, Family 6, Model 42, Stepping 7
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode extension)
......
dmidecode -t memory
etcetera