文章出处：https://linux.cn/article-5161-1.html
1、在基于Deb的系统中安装：
sudo apt-get install dmidecode
2、找出支持的最大内存：
sudo dmidecode -t 16
输出：
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
Handle 0x0005, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 64 GB
Error Information Handle: Not Provided
Number Of Devices: 4
3、找出现在已经安装的内存的详细信息：
sudo dmidecode -t 17
输出：
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
Handle 0x003C, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0005
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: None
Locator: DIMM1
Bank Locator: ChannelB
Type: DDR4
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 2133 MHz
Manufacturer: Samsung
Serial Number: 99373AEA
Asset Tag:
Part Number: M378A5143EB1-CPB
Rank: 1
Configured Clock Speed: 2133 MHz
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: 1.2 V
Handle 0x0009, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0005
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: Other
Set: None
Locator: DIMM2
Bank Locator: ChannelB
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified
Rank: Unknown
Configured Clock Speed: Unknown
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown
Handle 0x0008, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0005
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: None
Locator: DIMM3
Bank Locator: ChannelA
Type: DDR4
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 2133 MHz
Manufacturer: Samsung
Serial Number: 99373AEF
Asset Tag:
Part Number: M378A5143EB1-CPB
Rank: 1
Configured Clock Speed: 2133 MHz
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: 1.2 V
Handle 0x0007, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0005
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: Other
Set: None
Locator: DIMM4
Bank Locator: ChannelA
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified
Rank: Unknown
Configured Clock Speed: Unknown
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown