原文地址：http://blog.sina.com.cn/s/blog_69cc2f0b0100wk5g.html

1、查看内存槽数、那个槽位插了内存，大小是多少

sudo dmidecode|grep -P -A5 "Memory\s+Device"|grep Size|grep -v Range

或者

dmidecode -t 17

2、查看最大支持内存数

sudo dmidecode|grep -P 'Maximum\s+Capacity'

或者

sudo dmidecode -t 16

3、查看槽位上内存的速率，没插就是unknown。

sudo dmidecode|grep -A16 "Memory Device"|grep 'Speed'

附录：

dmidecode支持的数字参数：
 

Type  Information
   ----------------------------------------
        0   BIOS
        1   System
        2   BaseBoard
        3   Chassis
        4   Processor
        5   MemoryController
        6   MemoryModule
        7   Cache
        8   PortConnector
        9   SystemSlots
       10   On BoardDevices
       11   OEMStrings
       12   SystemConfiguration Options
       13   BIOSLanguage
       14   GroupAssociations
       15   System EventLog
       16   PhysicalMemory Array
       17   MemoryDevice
       18   32-bit MemoryError
       19   Memory ArrayMapped Address
       20   Memory DeviceMapped Address
       21   Built-inPointing Device
       22   PortableBattery
       23   SystemReset
       24   HardwareSecurity
       25   System PowerControls
       26   VoltageProbe
       27   CoolingDevice
       28   TemperatureProbe
       29   ElectricalCurrent Probe
       30   Out-of-bandRemote Access
       31   Boot IntegrityServices
       32   SystemBoot
       33   64-bit MemoryError
       34   ManagementDevice
       35   ManagementDevice Component
       36   ManagementDevice Threshold Data
       37   MemoryChannel
       38   IPMIDevice
       39   PowerSupply