- Linux Memory Slot Information Software
- Linux Memory Slot Information Check
- Linux Memory Slot Information Guide
- Linux Memory Slot Information Sheet
Most of the system administrators checks CPU & Memory utilization when they were facing some performance issue.
It is essential that your Linux system runs at an optimal level. A few simple terminal commands provide access to all relevant information and help you monitor memory statistics. In this tutorial, learn five powerful commands to check memory usage in Linux. Linux memory information Random access memory. When we talk about memory in this article, we usually mean random access memory. This is the memory which can be used for both showing and storing data. Typically we will find in this type of memory the programs that are running on the system, including the Linux kernel itself. The first command to obtain available memory information is the perfectly named tool free. This utility shows two different types of memory: normal memory and swap memory. Swap is a type of memory that you want to avoid needing as much as possible. If it would be used, then it means your normal memory is full. Check Linux memory usage with the free command. To check available free memory and swaps. Getting Information With dmidecode. Dmidecode is very useful command which can provide information about hardware of the system. Dmidecode will list a lot of information about CPU, Memory, Mainboard, Devices, Network etc. By default without providing any option. We will use -type 17 option in order to print detailed Memory or RAM information.
There is lot of utilities are available in Linux to check physical memory.These commands are help us to check the physical RAM present in system, also allow users to check memory utilization in varies aspect.
Most of us know only few commands and we are trying to include all the possible commands in this article.You may think, why I want to know all these commands instead of knowing some of the specific and routine commands.
Don’t think bad or don’t take in negative way because each one has different requirement and perception so, who’s looking for other purpose then this will very helpful for them.
What is RAM
Computer memory is a physical device which capable to store information temporarily or permanently. RAM stands for Random Access Memory is a volatile memory that stores information used by the operating system, software, and hardware.
Linux Memory Slot Information Software
Two types of memory is available.
- Primary Memory
- Secondary Memory
Linux Memory Slot Information Check
Primary memory is the main memory of the computer. CPU can directly read or write on this memory. It is fixed on the motherboard of the computer.
RAM:
Random Access Memory is a temporary memory. This information will go away when the computer is turned off.ROM:
Read Only Memory is permanent memory, that holds the data even if the system is switched off.
Method-1 : Using free Command
free displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the kernel. The information is gathered by parsing /proc/meminfo.
Suggested Read : free – A Standard Command to Check Memory Usage Statistics (Free & Used) in Linux
Method-2 : Using /proc/meminfo file
/proc/meminfo is a virtual text file that contains a large amount of valuable information about the systems RAM usage.
It reports the amount of free and used memory (both physical and swap) on the system.
Method-3 : Using top Command
Top command is one of the basic command to monitor real-time system processes in Linux. It display system information and running processes information like uptime, average load, tasks running, number of users logged in, number of CPUs & cpu utilization, Memory & swap information. Run top command then hit
E
to bring the memory utilization in MB.Suggested Read : TOP Command Examples to Monitor Server Performance
Method-4 : Using vmstat Command
vmstat is a standard nifty tool that report virtual memory statistics of Linux system. vmstat reports information about processes, memory, paging, block IO, traps, and cpu activity. It helps Linux administrator to identify system bottlenecks while troubleshooting the issues.
Suggested Read : vmstat – A Standard Nifty Tool to Report Virtual Memory Statistics
Method-5 : Using nmon Command
Linux Memory Slot Information Guide
nmon is a another nifty tool to monitor various system resources such as CPU, memory, network, disks, file systems, NFS, top processes, Power micro-partition and resources (Linux version & processors) on Linux terminal.
Just press
m
key to see memory utilization stats (cached, active, inactive, buffered, free in MB & free percent)Suggested Read : nmon – A Nifty Tool To Monitor System Resources On Linux
Method-6 : Using dmidecode Command
Dmidecode is a tool which reads a computer’s DMI (stands for Desktop Management Interface)
(some say SMBIOS – stands for System Management BIOS) table contents and display system hardware information in a human-readable format.
(some say SMBIOS – stands for System Management BIOS) table contents and display system hardware information in a human-readable format.
This table contains a description of the system’s hardware components, as well as other useful information such as serial number, Manufacturer information, Release Date, and BIOS revision, etc,.
Suggested Read :
Dmidecode – Easy Way To Get Linux System Hardware Information
Dmidecode – Easy Way To Get Linux System Hardware Information
Print only installed RAM modules.
Sum all the installed RAM modules.
Method-7 : Using hwinfo Command
hwinfo stands for hardware information tool is another great utility that used to probe for the hardware present in the system and display detailed information about varies hardware components in human readable format.
It reports information about CPU, RAM, keyboard, mouse, graphics card, sound, storage, network interface, disk, partition, bios, and bridge, etc,.
Suggested Read : hwinfo (Hardware Info) – A Nifty Tool To Detect System Hardware Information On Linux
Method-8 : Using lshw Command
lshw (stands for Hardware Lister) is a small nifty tool that generates detailed reports about various hardware components on the machine such as memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration, usb, network card, graphics cards, multimedia, printers, bus speed, etc.
It’s generating hardware information by reading varies files under /proc directory and DMI table.
Suggested Read : LSHW (Hardware Lister) – A Nifty Tool To Get A Hardware Information On Linux
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Method-9 : Using inxi Command
inxi is a nifty tool to check hardware information on Linux and offers wide range of option to get all the hardware information on Linux system that i never found in any other utility which are available in Linux. It was forked from the ancient and mindbendingly perverse yet ingenius infobash, by locsmif.
inxi is a script that quickly shows system hardware, CPU, drivers, Xorg, Desktop, Kernel, GCC version(s), Processes, RAM usage, and a wide variety of other useful information, also used for forum technical support & debugging tool.
Suggested Read : inxi – A Great Tool to Check Hardware Information on Linux
Method-10 : Using screenfetch Command
screenFetch is a bash script. It will auto-detect your distribution and display an ASCII art version of that distribution’s logo and some valuable information to the right.
Suggested Read : ScreenFetch – Display Linux System Information On Terminal With Distribution ASCII Art Logo
Method-11 : Using neofetch Command
Neofetch is a cross-platform and easy-to-use command line (CLI) script that collects your Linux system information and display it on the terminal next to an image, either your distributions logo or any ascii art of your choice.
Suggested Read : Neofetch – Shows Linux System Information With ASCII Distribution Logo
Method-12 : Using dmesg Command
dmesg (stands for display message or driver message) is a command on most Unix-like operating systems that prints the message buffer of the kernel.
Method-13 : Using atop Command
Atop is an ASCII full-screen system performance monitoring tool for Linux that is capable of reporting the activity of all server processes (even if processes have finished during the interval).
It’s logging of system and process activity for long-term analysis (By default, the log files are preserved for 28 days), highlighting overloaded system resources by using colors, etc. It shows network activity per process/thread with combination of the optional kernel module netatop.
Suggested Read : Atop – Monitor real time system performance, resources, process & check resource utilization history
Method-14 : Using htop Command
htop is an interactive process viewer for Linux which was developed by Hisham using ncurses library. Htop have many of features and options compared to top command.
Suggested Read : Monitor system resources using Htop command
Method-15 : Using corefreq Utility
CoreFreq is a CPU monitoring software designed for Intel 64-bits Processors and supported architectures are Atom, Core2, Nehalem, SandyBridge and superior, AMD Family 0F.
CoreFreq provides a framework to retrieve CPU data with a high degree of precision.
Linux Memory Slot Information Sheet
Suggested Read : CoreFreq – A Powerful CPU monitoring Tool for Linux Systems
Method-16 : Using glances Command
Glances is a cross-platform curses-based system monitoring tool written in Python. We can say all in one place, like maximum of information in a minimum of space. It uses psutil library to get information from your system.
Glances capable to monitor CPU, Memory, Load, Process list, Network interface, Disk I/O, Raid, Sensors, Filesystem (and folders), Docker, Monitor, Alert, System info, Uptime, Quicklook (CPU, MEM, LOAD), etc,.
Suggested Read : Glances (All in one Place)– An Advanced Real Time System Performance Monitoring Tool for Linux
Method-17 : Using gnome-system-monitor
System Monitor is a tool to manage running processes and monitor system resources. It shows you what programs are running and how much processor time, memory, and disk space are being used.
We have a lot of servers. There are different type of vendors and products. Tracking them about theirs hardware is hard work. For example to get ram information by opening all cases of servers is impossible. Here comes Linux magic. Linux provides a lot of commands. We can use
dmidecode
like below.dmidecode
is very useful command which can provide information about hardware of the system. dmidecode
will list a lot of information about CPU, Memory, Mainboard, Devices, Network etc. by default without providing any option. We will use --type 17
option in order to print detailed Memory or RAM information like below.We can see that the system has 2048 MB RAM and multiple RAM slots.
As we have seen that
dmidecode
will print a lot of information about the RAM but if we want to strictly filter the RAM size we can use grep
command like below by providing Size
term.Like RAM size we can also print the frequency of the RAM with
grep
command. As frequency is expressed with MHz
we will provide Speed
to the grep command.Memory/RAM has physically different form factors. Currently DIMM or SODIMM is very popular. We can get this information with the following command.