The CPU information includes details about the processor, like the architecture, vendor name, model, number of cores, a speed of each core etc. There are quite a few commands on Linux to get those details about the CPU hardware, and here is about some of the commands. Thanks a lot for sharing this useful list. Find Out Maximum Supported RAM In Linux using Dmidecode. From the man pages, Dmidecode is a tool for dumping a computer’s DMI (some say SMBIOS) table contents in a human-readable format. This table contains a description of the system’s hardware components, as well as other useful pieces of information such as serial numbers and BIOS revision. If you are looking to upgrade the memory in your Linux PC, you are probably wondering how many open slots you have, what type of memory is already installed, and what you need to buy for an upgrade without having to open your computer.
In a previous article, we put together a list of 10 useful commands to collect system and hardware information in Linux. In this guide, we will narrow down to the CPU/processor, and show you various ways of extracting detailed information about your machine CPU.
Just to give you an overview, we will query information such as CPU architecture, vendor_id, model, model name, number of CPU cores, speed of each core and lots more.
Essentially, the /proc/cpuinfo contains this all info, every other command/utility gets its output from this file.
With that said, below are 9 commands for getting info about your Linux CPU.
1. Get CPU Info Using cat Command
You can simply view the information of your system CPU by viewing the contents of the /proc/cpuinfo file with the help of cat command as follows:
To get a little specific, you can employ grep command – a CLI tool for searching plain-text data for lines matching a regular expression. This can help you only output vendor name, model name, number of processors, number of cores etc:
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Suggested Read:How to Use ‘cat’ and ‘tac’ Commands with Examples in Linux
2. lscpu Command – Shows CPU Architecture Info
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The command lscpu prints CPU architecture information from sysfs and /proc/cpuinfo as shown below:
3. cpuid Command – Shows x86 CPU
The command cpuid dumps complete information about the CPU(s) collected from the CPUID instruction, and also discover the exact model of x86 CPU(s) from that information.
Make sure to install it before running it.
Once installed, run cpuid to collect information concerning the x86 CPU.
4. dmidecode Command – Shows Linux Hardware Info
dmidecode is a tool for retrieving hardware information of any Linux system. It dumps a computer’s DMI (a.k.a SMBIOS) table contents in a human-readable format for easy retrieval. The SMBIOS specification defines various DMI types, for CPU, use “processor” as follows:
5. Inxi Tool – Shows Linux System Information
Inxi is a powerful command line system information script intended for both console and IRC (Internet Relay Chat). You can use it to instantly retrieve hardware information.
You can install like so:
To display complete CPU information, including per CPU clock-speed and CPU max speed (if available), use the -C flag as follows:
6. lshw Tool – List Hardware Configuration
lshw is a minimal tool for gathering in-depth information on the hardware configuration of a computer. You can use the -C option to select the hardware class, CPU in this case:
7. hardinfo – Shows Hardware Info in GTK+ Window
hardinfo displays hardware information in a GTK+ window, you can install it as follows:
Once you have it installed, type:
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It also enables you to generate a system hardware info report by clicking on the “Generate Report” button. From the interface below, click on “Generate” to proceed. Note that you can choose the hardware info category to be generated.
Generate System Information Report
Once you have generated the report in html format, you can view it from a web browser as shown below.
8. hwinfo – Shows Present Hardware Info
hwinfo is used to extract info about hardware present in a Linux system. To display info about your CPU, use the --cpu
9. nproc – Print Number of Processing Units
nproc command is used to show the number of processing unit present on your computer:
For additional usage info and options, read through the man pages of these commands like this:
Also check out:
That’s it for now! You can share with us additional ways of extracting CPU information in Linux via the feedback form below.
In this article we’ll see how we can use Dmidecode command to retrieve hardware information of any Linux system. Suppose if we want to upgrade a system we need to gather information like Memory, BIOS and CPU etc. With help of Dmidecode command we will come to know the details without opening system chasis. Dmidecode command works for RHEL/CentOS/Fedora/Ubuntu Linux.
Dmidecode tool read DMI (some say SMBIOS) table to fetch data and displays useful system informations like hardware details, serial numbers and BIOS version, Processor etc. in human readable format. You may require root priviledge to execute dmidecode command.
1. Basic Output of Demidecode
Below is the Demidecode command sample output.
2. How to Get DMI Types
DMI Id give us particular hardware information of system. Dmidecode with options ‘-t ‘or ‘–type‘ and ‘Id‘ will provide us the exact infromation. Id 6 will give us Memory Module information.
Following are the DMI types details.
Instead of going with ‘type_id‘ you can also use keyword with ‘-t‘ argument to the dmidecode command. Following are the list of available keywords.
For example, to get the Cache information on system, you can execute below command instead of Id 7.
3. How to Get Memory Information
How do i get Memory information on system and how much memory is supported by system? The following command shows that the system can support maximum 4GB of RAM.
Note: From the keyword list the memory related information IDs are 5, 6, 16 and 17.
4. How Do I Get BIOS information?
To get the BIOS information of the system, run the following command with ‘-t’ option.
5. How Do I Get the Manufacturer, Model and Serial Number?
To get the information about Manufacturer, Model and Serial Number of system, use the following command as shown below.
Please run ‘man dmidecode‘ from terminal or command prompt to know more about dmidecode.
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Read Also: 10 Command Line Tools to Get Linux Hardware Information