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Check Memory Slots Linux

If you need a quick way to find out how much RAM your Linux system supports or to determine the number of DIMM slots available, you can use a command line tool called 'dmidecode'.

If you need memory totals, you can add the t option like so: free -mt. This will simply total the amount of memory in columns (Figure 5). Figure 5: Having free total your memory columns for you. Another very handy tool to have at your disposal is vmstat. This particular command is a one-trick pony that reports virtual memory statistics. In this article we will see basic commands to check physical memory on a server in Linux. Many beginners struggle with knowing their system well in context to resources like CPU, Memory, disks, etc. So I decided to write this small article pinpointing commands to check RAM on the Linux server. The love Linux Check Memory Slots Used for gambling of all forms in the UK led quickly to creating a huge online presence. Many of the traditional betting shops opened up websites, accepting deposits online and opening the door for players to play real money games including poker, casino, and bingo.


To find out the maximum RAM capacity and the number of RAM slots available, use the following command:

The output should look something like this:

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The 'Maximum Capacity' is the maximum RAM supported by your system, while 'Number of Devices' is the number of memory (DIMM) slots available on your computer.

To see complete memory information, including the info above along with currently installed memory information (RAM speed, size, etc.), use:

Check memory slots linux usbHere's an example output for the command above:
You can also use lshw (among others) for this (firstly, install it; in Ubuntu: 'sudo apt-get install lshw):

Check
It's important to note that Dmidecode reports system hardware information as described in the BIOS and does not scan your hardware, so in some cases the output can be wrong. Running dmidecode on my Dell XPS L702X non-3D laptop, the output says my system should have 4 RAM slots but in fact there are only 2 and only the 3D version of my laptop can have 4 RAM slots (and by the way, there are some Windows applications reporting the same thing), however, the command is accurate about it supporting 16 GB of RAM.

Also see: How To Get Hardware Information In Linux

Here’s a useful way of finding out how many memory slots are occupied on the motherboard of a machine without removing the cover, as well as how much installed physical memory is supported.

We can use the dmidecode command to reveal your systems DMI table, which contains details of the systems hardware.

There are a whole load of DMI types we can look at – a full table of those at the end of this article.

In this particular case, we are interested in memory – type 16 ‘Physical Memory Array’ will show us how much memory is supported and DMI type 17 will reveal details of currently installed memory.

So, first off:-

dmidecode -t 16

Maximum Capacity shows us the maximum amount of memory can be installed in the machine. Number of devices tells us how many slots there are on the motherboard – in this case, 8.

Now we can interrogotate DMI type 17 – ‘Memory Device’ to show us details of installed memory

dmidecode -t 17

Check Memory Slots Linux

Each module installed will be listed with the the information given above. If we just want to know how many modules are installed and what size they are, we only really need the Size: – so we use grep

dmidecode -t 17 grep Size

From this we can see that 8x 2048MB modules are installed – so all the slots on the motherboard are populated.

There is plenty of other useful information that can be retrieved using dmidecode, including

-t1 System

-t2 Base Board

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-t3 Chassis

-t4 CPU

-t9 PCI slots

Full SMIBIOS Specification

Check Memory Slots Linux Usb

1 System
2 Base Board
3 Chassis
4 Processor
5 Memory Controller
6 Memory Module
7 Cache
8 Port Connector
9 System Slots
10 On Board Devices
11 OEM Strings
12 System Configuration Options
13 BIOS Language
14 Group Associations
15 System Event Log
16 Physical Memory Array
17 Memory Device
18 32-bit Memory Error
19 Memory Array Mapped Address
20 Memory Device Mapped Address
21 Built-in Pointing Device
22 Portable Battery
23 System Reset
24 Hardware Security
25 System Power Controls
26 Voltage Probe
27 Cooling Device
28 Temperature Probe
29 Electrical Current Probe
30 Out-of-band Remote Access
31 Boot Integrity Services
32 System Boot
33 64-bit Memory Error
34 Management Device
35 Management Device Component
36 Management Device Threshold Data
37 Memory Channel
38 IPMI Device
39 Power Supply
40 Additional Information
41 Onboard Device