如何向运行Ubuntu Linux的服务器添加更多RAM。
我如何在不打开机箱的情况下找到我当前的RAM芯片信息，例如在Linux系统中的速度，类型和制造商名称？
您需要使用dmidecode命令，该命令是用于以人类可读格式转储计算机DMI(有时称为SMBIOS)表内容的工具。
该表包含对系统硬件组件(例如RAM)的描述，以及其他有用的信息，例如序列号和BIOS版本。
由于有了此表，您可以检索硬件信息，而不必探究实际的硬件。
打开命令行终端(选择应用程序>附件>终端)，然后执行：

$ sudo dmidecode --type memory

或者

# dmidecode --type memory | less

或者

$ sudo dmidecode --type 17

输出示例：

# dmidecode 2.10
SMBIOS version fixup (2.51 -> 2.6).
SMBIOS 2.6 present.

Handle 0x0011, DMI type 16, 15 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: None
	Maximum Capacity: 4 GB
	Error Information Handle: Not Provided
	Number Of Devices: 4

Handle 0x0012, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM#1A
	Bank Locator: Bank 1
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified

Handle 0x0013, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM#2A
	Bank Locator: Bank 2
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified

Handle 0x0014, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM#1B
	Bank Locator: Bank 1
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified

Handle 0x0015, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM#2B
	Bank Locator: Bank 2
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified