Linux: view memory size and slot; linux: view memory size

Linux: view memory size and slot; linux: view memory size

Preface

I believe that everyone must be comfortable with changing the memory of their laptops. Even a newbie can easily implement it. In fact, it is very easy to replace the memory of the server, shutdown-> cover-> plugging in the specified order. However, there is a very important common premise here. We need to clearly understand the memory size and model matching the current hardware, the number of slots, and other dependencies, so that we can be more comfortable with changing the memory.

Useful tips before Memory Replacement

Update history

April June 05, 2015-first draft

Http://wsgzao.github.io/post/linux-memory/

Additional reading

• MacBook Pro: how to remove or install memory-https://support.apple.com/zh-cn/HT1270

Practice Process

In Linux, check the number of memory slots, the number of slots used, the size of each memory, and the size of memory used.

dmidecode | grep  -P  -A5  "Memory\s+Device" | grep Size | grep -v Range         Size: 16384 MB        Size: No Module Installed        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed        Size: 16384 MB        Size: No Module Installed

Linux: view the maximum memory capacity supported by memory

dmidecode | grep -P  'Maximum\s+Capacity'        Maximum Capacity: 1536 GB

Linux memory viewing frequency

dmidecode | grep -A16 "Memory Device" | grep "Speed"        Speed: 1600 MHz (0.6 ns)        Speed: Unknown        Speed: Unknown        Speed: 1600 MHz (0.6 ns)        Speed: Unknown        Speed: Unknown        Speed: Unknown        Speed: Unknown        Speed: 1600 MHz (0.6 ns)        Speed: Unknown        Speed: Unknown        Speed: 1600 MHz (0.6 ns)        Speed: 1600 MHz (0.6 ns)        Speed: Unknown        Speed: Unknown        Speed: 1600 MHz (0.6 ns)        Speed: Unknown        Speed: Unknown        Speed: Unknown        Speed: Unknown        Speed: 1600 MHz (0.6 ns)        Speed: Unknown        Speed: Unknown        Speed: 1600 MHz (0.6 ns)

View detailed motherboard Information

dmidecode | grep -A16 "System Information$"

View detailed memory information

dmidecode | grep -A16 "Memory Device$"dmidecode -t memory