Some time back I was using a command called meminfo in Solaris to find the memory information in Solaris. It is indeed a nice script written by schmidt http://www.4schmidts.com/memconf.html .

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Nov 21, 2019 The procedure is as follows: Open the terminal application or log in using ssh command. Type the “ sudo dmidecode -type 17 ” command. Look out for “ Type: ” line in the output for ram type and “ Speed: ” for ram speed. Millions of customers have trusted the Crucial System Scanner to find memory and storage upgrades. In minutes, learn how much memory and storage your PC or Mac can support, then buy 100% guaranteed compatible upgrades with confidence. Apr 15, 2019 The speed of the RAM means how many cycles per seconds it can perform. A 3200 MHz RAM can perform 3200 cycles ( read/write sessions) in one second. You can use the following command as sudo in order to check the type of your RAM. $ sudo dmidecode -type memory less.

Later, I moved my role from supporting Solaris systems to Linux systems and I was struggling to get the same piece of info in Linux about the memory bank/slot and how memory is present in each memory bank. Today I got an audit work to validate the system data that someone has filled about Linux servers. So, this time I couldn’t escape and I had to find a way out. I always knew that there should be info in dmidecode command, but as usual my laziness was stopping me from looking in to the output.

So finally I had to push my lazy attitude and dive in to the Info which dmidecode was giving. I was really surprised to see that there is enough info that we can grab from the dmidecode output. So here is my analysis.

• First check the actual memory Info from the either “top” or “free -m” command.
• Check the “dmidecode” output for the DIMM slot and each RAM size

FREE COMMAND OUTPUT

So the below command shows that we have around 2GB of memory installed in the system.

[root@bravo]# free -m
total used free shared buffers cached
Mem: 2026 1585 440 0 222 551
-/+ buffers/cache: 811 1215
Swap: 4094 0 4094

TOP COMMAND OUTPUT

Let’s verify our understanding of memory available using the TOP command which also shows that we have approx 2GB memory approx.

[root@bravo]# top

top – 13:18:56 up 216 days, 4:12, 3 users, load average: 0.14, 0.11, 0.09
Tasks: 199 total, 1 running, 198 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.8% us, 1.4% sy, 0.0% ni, 97.4% id, 0.3% wa, 0.0% hi, 0.0% si
Mem: 2074900k total, 1623648k used, 451252k free, 227816k buffers
Swap: 4192924k total, 296k used, 4192628k free, 565160k cached

DMIDECODE COMMAND

Run the DMIDECODE command and look for the data where the word “Physical Memory Array” starts and go through each line to get detailed information. In some new systems you can also use the command dmidecode –s memory and dmidecode –t 17 , where “s” means string and “t” means type. Let’s just use dmidecode here for now.

Summary of the memory data

——————————————————————————————-

Maximum memory that the ON BOARD memoryslots can accept is= 8GB

Type of memory = DDR

Error Correction Type: Single-bit ECC

Size of each DIMM = 1024 MB (1GB)

DIMM Speed = 333 MHz (3.0 ns)

Number of DIMM slots = Total4 DIMM slots and only 2 DIMM slots are filled with 1GB memory each

Note: where ever the Memory module is not installed the “Size” would show as “Size: No Module Installed”

——————————————————————————————-

[root@bravo]# dmidecode more

So here is the summary of the Info that we are looking from the Important Information we have from the dmidecode data

Handle 0x1000
DMI type 16, 15 bytes.
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Single-bit ECC
Maximum Capacity: 8 GB
Error Information Handle: Not Provided
Number Of Devices: 4

Handle 0x1100
DMI type 17, 23 bytes.
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 1024 MB
Form Factor: DIMM
Set: 1
Locator: DIMM 01
Bank Locator: Not Specified
Type: DDR
Type Detail: Synchronous
Speed: 333 MHz (3.0 ns)
Handle 0x1101
DMI type 17, 23 bytes.
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 1024 MB
Form Factor: DIMM
Set: 1
Locator: DIMM 02
Bank Locator: Not Specified
Type: DDR
Type Detail: Synchronous
Speed: 333 MHz (3.0 ns)

Handle 0x1102
DMI type 17, 23 bytes.
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: 2
Locator: DIMM 03
Bank Locator: Not Specified
Type: DDR
Type Detail: Synchronous
Speed: 333 MHz (3.0 ns)

Handle 0x1103
DMI type 17, 23 bytes.
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: 2
Locator: DIMM 04
Bank Locator: Not Specified
Type: DDR
Type Detail: Synchronous
Speed: 333 MHz (3.0 ns)

So here is my learning for the day. So I am signing of for the day looking forward to learn something new tomorrow. Infact there are couple of things that I have learnt today and I would try to either share it today or tomorrow in my new post.

Also, one thing that I started believing these days is that there is no job which is small or waste of time. We just have to look at the learning that we can grab from it. I am sure every job teaches us something might not be technical always but I am sure we would have some thing to learn from it directly or in directly.

Adios ! Amigos !

The desire to write grows with writing.Desiderius Erasmus

Run ” free -m ” to see RAM information in MB.

Run ” free -g ” to see RAM information in GB.

Click on the power/gear icon (System Menu) in the top right corner of the screen and choose About This Computer.

You will see the total available memory in GiB.

What is the command to check RAM in Linux?

How to check ram speed and type on Linux or Unix-like system:

• Open the terminal app or log in using ssh.
• Type the “ sudo dmidecode –type 17 ” command.
• Look out for “Type:” line in the output for ram type and “Speed:” for ram speed.

How do I check my RAM size?

From the desktop or Start menu, right-click on Computer and select Properties. In the System Properties window, the system will list “Installed memory (RAM)” with the total amount detected. For example, in the picture below, there is 4 GB of memory installed in the computer.

How do I free up RAM on Linux?

How to Clear RAM Memory Cache, Buffer and Swap Space on Linux

1. Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches.
2. Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches.
3. Clear PageCache, dentries and inodes. # sync; echo 3 > /proc/sys/vm/drop_caches.
4. sync will flush the file system buffer. Command Separated by “;” run sequentially.

How do I check memory usage on Linux?

Its just like what happens on your desktop PC.

• free command. The free command is the most simple and easy to use command to check memory usage on linux.
• /proc/meminfo. The next way to check memory usage is to read the /proc/meminfo file.
• vmstat.
• top command.
• htop.

How much RAM do I have Linux?

Run ” free -m ” to see RAM information in MB. Run ” free -g ” to see RAM information in GB. Click on the power/gear icon (System Menu) in the top right corner of the screen and choose About This Computer. You will see the total available memory in GiB.

How do I check my PuTTY RAM?

How to check the RAM usage in putty

1. Step 2:If you get a “PuTTY Security Alert“, click yes to continue (If you read the message, this is your server so you should trust it).
2. Step 3: You will see “Login As“.
3. Step 4 : Enter the command # free -m.
4. Step 5 : Then you would get the complete RAM usage of your VPS server.

How do I identify my RAM type?

2A: Use the memory tab. It will show the frequency, that number needs to be doubled and then you can find the right ram on our DDR2 or DDR3 or DDR4 pages. When you are on those pages, just select the speed box and the type of system (desktop or notebook) and it will display all available sizes.

Is 8gb RAM enough?

8GB is a good place to start. While many users will be fine with less, the price difference between 4GB and 8GB isn’t drastic enough that it’s worth opting for less. An upgrade to 16GB is recommended for enthusiasts, hardcore gamers, and the average workstation user.

How do I check my RAM speed?

To find out information about your computer’s memory, you can look at the settings in Windows. Just open up the Control Panel and click on System and Security. There should be a subheading called ‘View amount of RAM and processor speed’.

How do I clear my RAM cache?

Clear Memory Cache on Windows 7

• Right-click anywhere on the desktop and select “New” > “Shortcut.”
• Enter the following line when asked for location of the shortcut:
• Hit “Next.”
• Enter a descriptive name (such as “Clear Unused RAM”) and hit “Finish.”
• Open this newly created shortcut and you will notice a slight increase in performance.

How do I free up memory in Ubuntu?

In order to view the memory usage, we are using the Ubuntu command line, the Terminal application. You can open the Terminal either through the system Dash or the Ctrl+alt+T shortcut.

5 Ways to Check Available Memory in Ubuntu

1. The free command.
2. The vmstat command.
3. The /proc/meminfo command.
4. The top command.
5. The htop command.

How clear DNS cache Linux?

If your Linux system is caching DNS entries, then you can try to flush the DNS cache in order to get rid of any DNS related problems. To clear DNS cache in Ubuntu, you can follow the steps below: 1. Launch Terminal (ctrl + alt + T), and type “sudo /etc/init.d/dns-clean restart“.

How do I check physical memory on Linux?

4 ways to check size of physical memory (RAM) in Linux

• Using free command. First command is free.
• Using /proc/meminfo file. Another way is to read memory info from proc filesystem.
• Using top command. Famous top command also lists physical memory information in very clear way.
• Using vmstat. Another way is to use vmstat (virtual memory stats) command with -s switch.

How do I check storage on Linux?

Linux command to check disk space

1. df command – Shows the amount of disk space used and available on Linux file systems.
2. du command – Display the amount of disk space used by the specified files and for each subdirectory.
3. btrfs fi df /device/ – Show disk space usage information for a btrfs based mount point/file system.

How much RAM does Ubuntu use?

Recommended. According to the Ubuntu wiki, Ubuntu requires a minimum of 1024 MB of RAM, but 2048 MB is recommended for daily use. You may also consider a version of Ubuntu running an alternate desktop environment requiring less RAM, such as Lubuntu or Xubuntu. Lubuntu is said to run fine with 512 MB of RAM.

How do I see running processes in Linux?

How to Manage Processes from the Linux Terminal: 10 Commands You Need to Know

• top. The top command is the traditional way to view your system’s resource usage and see the processes that are taking up the most system resources.
• htop. The htop command is an improved top.
• ps.
• pstree.
• kill.
• pgrep.
• pkill & killall.
• renice.

How do I find the OS version on Linux?

Check os version in Linux

1. Open the terminal application (bash shell)
2. For remote server login using the ssh: ssh user@server-name.
3. Type any one of the following command to find os name and version in Linux: cat /etc/os-release. lsb_release -a. hostnamectl.
4. Type the following command to find Linux kernel version: uname -r.

How do I check cores in Linux?

You can use one of the following methods to determine the number of physical CPU cores.

• Count the number of unique core ids (roughly equivalent to grep -P ‘^core idt’ /proc/cpuinfo.
• Multiply the number of ‘cores per socket’ by the number of sockets.
• Count the number of unique logical CPU’s as used by the Linux kernel.

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How do I check my computer specs on Ubuntu?

Hit Super (Start button in windows) , Type and and open System Monitor . For full details system information use HardInfo : Click to install. HardInfo can display information about both your system’s hardware and operating system. for command line solutions, you can use the command lshw.

Is 8gb RAM enough for coding?

Aim for 8GB of RAM. Often, 8GB of RAM is enough for most programming and development needs. However, game developers or programmers who also work with graphics may need RAM around 12GB. 16GB is max RAM at the moment and only heavy graphics designers and video editors need that much.

How much does 8gb of RAM cost?

2GB stick – around $10 -20 (DDR3) 4GB stick – around $20-30 (DDR3), or around $30-45 (DDR4) 8GB stick/kit – around $40-60 (DDR3), or around $60-90 (DDR4)

Is 16gb RAM necessary?

In general, yes. The only real reason an average user would need 32GB is for future proofing. As far as just simply gaming goes, 16GB is plenty, and really, you can get by just fine with 8GB. In a handful of gaming performance tests, Techspot found basically no difference between 8GB and 16GB in terms of framerate.

Can you mix RAM speeds?

You are right about mixing different RAM modules—if there’s one thing you absolutely can’t mix, it’s DDR with DDR2, or DDR2 with DDR3, and so on (they won’t even fit in the same slots). RAM is pretty complicated, but there are a few things you can mix and a few things you shouldn’t. In any case, I don’t recommend it.

How do I know what DDR my RAM is?

If you open the Control Panel and navigate to System and Security, under the system subheading, you should see a link called ‘View amount of RAM and processor speed’. Clicking on this will bring up some basic specifications for your computer such as memory size, OS type, and processor model and speed.

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How do I know the voltage of my RAM?

To check your RAM voltage in SpeedFan, open the “Readings” tab and look through the voltage ratings for a value close to your RAM’s suggested setting (between 1.05v and 1.8v). SpeedFan may list the RAM voltage next to a “Vcore” reading.

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Photo in the article by “Ybierling” https://www.ybierling.com/en/blog-officeproductivity-notepadpprandomizesortlinesrandom

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