How To Get Linux CPU Information?

CPU or Central Processing Unit is the core part of the computers. CPU mainly processes data that is provided from different sources. CPU provides a lot of different features for different processing needs. These features and information about the CPU can be listed by using different commands in Linux.

/proc/cpuinfo File

One of the most fundamental source for the CPU information is the /proc/cpuinfo file. Most of the commands related to CPU info get information from this file. As a simple text file echo command can be used to print CPU information via the /proc/cpuinfo.

cat /proc/cpuinfo

The output is very detailed where following information is provided.

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
stepping    : 9
microcode    : 0xb4
cpu MHz        : 2808.005
cache size    : 6144 KB
physical id    : 0
siblings    : 1
core id        : 0
cpu cores    : 1
apicid        : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse ... flush_l1d arch_capabilities
vmx flags    : vnmi invvpid ept_x_only ... unrestricted_guest ple ept_mode_based_exec
bugs        : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips    : 5616.01
clflush size    : 64
cache_alignment    : 64
address sizes    : 45 bits physical, 48 bits virtual
power management:
processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
stepping    : 9
microcode    : 0xb4
cpu MHz        : 2808.005
cache size    : 6144 KB
physical id    : 2
siblings    : 1
core id        : 0
cpu cores    : 1
apicid        : 2
initial apicid    : 2
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr ... flush_l1d arch_capabilities
vmx flags    : vnmi invvpid ept_x_only ... unrestricted_guest ple ept_mode_based_exec
bugs        : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips    : 5616.01
clflush size    : 64
cache_alignment    : 64
address sizes    : 45 bits physical, 48 bits virtual
power management:

lscpu Command

The lscpu command is another popular command which is used to list CPU information via the command-line interface. The cpuinfo command prints the CPU information in a more readable way. But the lscpu command provides less information than the /proc/cpuinfo file.

lscpu

The output is like below.

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   45 bits physical, 48 bits virtual
CPU(s):                          2
On-line CPU(s) list:             0,1
Thread(s) per core:              1
Core(s) per socket:              1
Socket(s):                       2
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           158
Model name:                      Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Stepping:                        9
CPU MHz:                         2808.005
BogoMIPS:                        5616.01
Virtualization:                  VT-x
Hypervisor vendor:               VMware
Virtualization type:             full
L1d cache:                       64 KiB
L1i cache:                       64 KiB
L2 cache:                        512 KiB
L3 cache:                        12 MiB
NUMA node0 CPU(s):               0,1
Vulnerability Itlb multihit:     KVM: Mitigation: VMX disabled
Vulnerability L1tf:              Mitigation; PTE Inversion; VMX flush not necessary, SMT disabled
Vulnerability Mds:               Mitigation; Clear CPU buffers; SMT Host state unknown
Vulnerability Meltdown:          Mitigation; PTI
Vulnerability Spec store bypass: Mitigation; Speculative Store ... and seccomp
Vulnerability Spectre v1:        Mitigation; ...  and __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full generic retpoline, ... sabled, RSB filling
Vulnerability Srbds:             Unknown: Dependent on hypervisor status
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr ... xsaves arat md_clear flush_l1 arch_capabilities
  • Architecture lists if the CPU is 32 bit or 64 bit or an ARM processor.
  • CPU ops-mode prints if the CPU runs 32-bit or 64-bit applications or both of them.
  • Model Name provides the manufacturer and model name of the CPU.
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cpuid Command

The cpuid command provides similar information where the CPU information is extracted by using the CPUID instruction. It provides information like vendor ID, CPU Family, etc. Most of the Linux distributions do not come preinstalled with the cpuid command. The cpuid can be installed like below.

Install cpuid For Ubuntu, Debian, Mint:

sudo apt install cpuid

Install cpuid For CentOS, RHEL, Fedora:

sudo yum install cpuid

After installing we will run the cpuid command like below. The cpuid command lists every core of the processor separately.

cpuid

The output is like below.

CPU 0:
    vendor_id = "GenuineIntel"
    version information (1/eax):
       processor type  = primary processor (0)
       family          = 0x6 (6)
       model           = 0xe (14)
       stepping id     = 0x9 (9)
       extended family = 0x0 (0)
       extended model  = 0x9 (9)
       (family synth)  = 0x6 (6)
       (model synth)   = 0x9e (158)
       (simple synth)  = Intel Core (unknown type) (Kaby Lake / Coffee Lake) 14nm
    miscellaneous (1/ebx):
       process local APIC physical ID = 0x0 (0)
       maximum IDs for CPUs in pkg    = 0x1 (1)
       CLFLUSH line size              = 0x8 (8)
       brand index                    = 0x0 (0)
    brand id = 0x00 (0): unknown
    feature information (1/edx):
       x87 FPU on chip                        = true
       VME: virtual-8086 mode enhancement     = true
       DE: debugging extensions               = true
       PSE: page size extensions              = true
       TSC: time stamp counter                = true
       RDMSR and WRMSR support                = true
       PAE: physical address extensions       = true
       MCE: machine check exception           = true
...

dmidecode Command

dmidecode is a very useful command which simply retrieves and displays all hardwares and related information. The dmidecode do not onlydisplay information about CPU also provides information about Mainboard, RAM, Graphic Card, HDD, SSD etc. In order to display only CPU related information the –type processor parameter should be provided. As a complex command the dmidecode requires root privileges to access detailed information. The root access can be provided with the sudo command.

sudo dmidecode --type processor

The output is like below. The following information is about first CPU code which is number as Core0 and all other cores information is printed like below.

dmidecode 3.2
 Getting SMBIOS data from sysfs.
 SMBIOS 2.7 present.
 Handle 0x0004, DMI type 4, 42 bytes
 Processor Information
     Socket Designation: CPU #000
     Type: Central Processor
     Family: Unknown
     Manufacturer: GenuineIntel
     ID: E9 06 09 00 FF FB 8B 0F
     Version: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
     Voltage: 3.3 V
     External Clock: Unknown
     Max Speed: 30000 MHz
     Current Speed: 2800 MHz
     Status: Populated, Enabled
     Upgrade: ZIF Socket
     L1 Cache Handle: 0x0094
     L2 Cache Handle: 0x0114
     L3 Cache Handle: Not Provided
     Serial Number: Not Specified
     Asset Tag: Not Specified
     Part Number: Not Specified
     Core Count: 1
     Core Enabled: 1
     Characteristics:
         64-bit capable
         Execute Protection
         Enhanced Virtualization
...

inxi Command

The inxi is very simple tool which provides very basic information about the CPU. the inxi is not installed by default for popular Linux distributions and can be installed like below.

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Debian, Ubuntu, Mint, Kali:

sudo apt install inxi

CentOS, RHEL, Fedora:

sudo yum install inxi

The inxi tool provides information about all hardware but we can use the -C option in order to print information about CPU or processor.

inxi -C

The inxi output is formatted and colored like below.

CPU:    Info: 2x Single Core model: Intel Core i7-7700HQ bits: 64 type: SMP L2 cache: 12.0 MiB 
           Speed: 2808 MHz min/max: N/A Core speeds (MHz): 1: 2808 2: 2808 

lshw Command

The lshw is a small tool which is used to extract detailed information about the hardware. The CPU or processor information can be listed by using the -C CPU option like below. The lshw command reuqires the root privileges which can be provided with the sudo command.

sudo lshw -C CPU

The output is like below.

*-cpu:0                   
        description: CPU
        product: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
        vendor: Intel Corp.
        physical id: 1
        bus info: [email protected]
        version: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
        slot: CPU #000
        size: 2300MHz
        capacity: 4230MHz
        width: 64 bits
        capabilities: lm fpu fpu_exce ... md_clear flush_l1d arch_capabilities
        configuration: cores=4 enabledcores=4

hardinfo Tool (GUI)

The hardinfo tool is a tool used to provide hardware information about the system. The hardinfo is a graphical tool which is different from other tools we have listed. The hardinfo also provides benchmark for the current system. The hardinfo is not installed by default in most of the Linux distributions.

Debian, Mint, Kali, Ubuntu:

sudo apt install hardinfo

CentOS, RHEL, Fedora:

sudo yum install hardinfo

The hardinfo tool can be opened from the start menu of the desktop environment or by running the hardinfo command from the bash shell.

hardinfo
HardInfo Tool For CPU Information

hwinfo command

The hwinfo command provides detailed information about the current hardware in the Linux system. The hwinfo is not installed by default and can be installed like below.

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Debian, Mint, Ubuntu, Kali:

sudo apt install hwinfo

RHEL, CentOS, Fedora:

sudo yum install hwinfo

The get only CPU related information the –cpu option should be provided like below.

hwinfo --cpu

The output is like below.

01: None 00.0: 10103 CPU                                        
   [Created at cpu.465]
   Unique ID: rdCR.j8NaKXDZtZ6
   Hardware Class: cpu
   Arch: X86-64
   Vendor: "GenuineIntel"
   Model: 6.142.12 "Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz"
   Features: fpu,vme,de,pse ... h_l1d,arch_capabilities
   Clock: 2304 MHz
   BogoMips: 4608.00
   Cache: 8192 kb
   Units/Processor: 4
   Config Status: cfg=new, avail=yes, need=no, active=unknown

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