9 Useful Commands to Get CPU Information on Linux

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:

$ cat /proc/cpuinfo

Linux CPU Information

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 69
model name : Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
stepping : 1
microcode : 0x1c
cpu MHz : 1700.062
cache size : 3072 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts
bugs :
bogomips : 4788.92
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
......


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:

$ cat /proc/cpuinfo | grep 'vendor' | uniq #view vendor name
$ cat /proc/cpuinfo | grep 'model name' | uniq #display model name
$ cat /proc/cpuinfo | grep processor | wc -l #count the number of processing units
$ cat /proc/cpuinfo | grep 'core id' #show individual cores 

Suggested Read: How to Use ‘cat’ and ‘tac’ Commands with Examples in Linux

2. lscpu Command – Shows CPU Architecture Info

The command lscpu prints CPU architecture information from sysfs and /proc/cpuinfo as shown below:

$ lscpu

Linux CPU Architecture

Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 69
Model name: Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
Stepping: 1
CPU MHz: 1303.687
CPU max MHz: 2700.0000
CPU min MHz: 800.0000
BogoMIPS: 4788.92
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 3072K
NUMA node0 CPU(s): 0-3
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts

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.

$ sudo apt install cpuid #Debian/Ubuntu systems
$ sudo yum install cpuid #RHEL/CentOS systems $ sudo dnf install cpuid #Fedora 22+ 

Once installed, run cpuid to collect information concerning the x86 CPU.

$ cpuid

Shows x86 CPU Information

CPU 0:
vendor_id = "GenuineIntel"
version information (1/eax):
processor type = primary processor (0)
family = Intel Pentium Pro/II/III/Celeron/Core/Core 2/Atom, AMD Athlon/Duron, Cyrix M2, VIA C3 (6)
model = 0x5 (5)
stepping id = 0x1 (1)
extended family = 0x0 (0)
extended model = 0x4 (4)
(simple synth) = Intel Mobile Core i3-4000Y / Mobile Core i5-4000Y / Mobile Core i7-4000Y / Mobile Pentium 3500U/3600U/3500Y / Mobile Celeron 2900U (Mobile U/Y) (Haswell), 22nm
miscellaneous (1/ebx):
process local APIC physical ID = 0x0 (0)
cpu count = 0x10 (16)
CLFLUSH line size = 0x8 (8)
brand index = 0x0 (0)
brand id = 0x00 (0): unknown
feature information (1/edx):
x87 FPU on chip = true
virtual-8086 mode enhancement = true
debugging extensions = true
page size extensions = true
time stamp counter = true
RDMSR and WRMSR support = true
physical address extensions = true
....

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:

$ sudo dmidecode --type processor

Shows Linux Hardware Information

# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
Handle 0x0004, DMI type 4, 42 bytes
Processor Information
Socket Designation: U3E1
Type: Central Processor
Family: Core i5
Manufacturer: Intel(R) Corporation
ID: 51 06 04 00 FF FB EB BF
Signature: Type 0, Family 6, Model 69, Stepping 1
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (Time stamp counter)
MSR (Model specific registers)
PAE (Physical address extension)
MCE (Machine check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (On-chip APIC hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page global enable)
MCA (Machine check architecture)
.....

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:

$ sudo apt install inxi #Debian/Ubuntu systems
$ sudo yum install inxi #RHEL/CentOS systems $ sudo dnf install inxi #Fedora 22+ 

To display complete CPU information, including per CPU clock-speed and CPU max speed (if available), use the -C flag as follows:

$ inxi -C

Print Linux System Information

CPU: Dual core Intel Core i5-4210U (-HT-MCP-) cache: 3072 KB clock speeds: max: 2700 MHz 1: 1958 MHz 2: 1993 MHz 3: 1775 MHz 4: 1714 MHz

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:

$ sudo lshw -C CPU

Print Linux Hardware Configuration

*-cpu description: CPU
product: Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
vendor: Intel Corp.
physical id: 4
bus info: [email protected]
version: Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
serial: To Be Filled By O.E.M.
slot: U3E1
size: 2626MHz
capacity: 2700MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts cpufreq
configuration: cores=2 enabledcores=2 threads=4

7. hardinfo – Shows Hardware Info in GTK+ Window

hardinfo displays hardware information in a GTK+ window, you can install it as follows:

$ sudo apt install hardinfo #Debian/Ubuntu systems
$ sudo yum install hardinfo #RHEL/CentOS systems $ sudo dnf install hardinfo #Fedora 22+ 

Once you have it installed, type:

$ hardinfo 

Linux System Information

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.

Linux System Detailed Information

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

$ hwinfo --cpu

Print Present Hardware Information

01: None 00.0: 10103 CPU [Created at cpu.460]
Unique ID: rdCR.j8NaKXDZtZ6
Hardware Class: cpu
Arch: X86-64
Vendor: "GenuineIntel"
Model: 6.69.1 "Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz"
Features: fpu,vme,de,pse,tsc,msr,pae,mce,cx8,apic,sep,mtrr,pge,mca,cmov,pat,pse36,clflush,dts,acpi,mmx,fxsr,sse,sse2,ss,ht,tm,pbe,syscall,nx,pdpe1gb,rdtscp,lm,constant_tsc,arch_perfmon,pebs,bts,rep_good,nopl,xtopology,nonstop_tsc,aperfmperf,eagerfpu,pni,pclmulqdq,dtes64,monitor,ds_cpl,vmx,est,tm2,ssse3,sdbg,fma,cx16,xtpr,pdcm,pcid,sse4_1,sse4_2,movbe,popcnt,tsc_deadline_timer,aes,xsave,avx,f16c,rdrand,lahf_lm,abm,epb,tpr_shadow,vnmi,flexpriority,ept,vpid,fsgsbase,tsc_adjust,bmi1,avx2,smep,bmi2,erms,invpcid,xsaveopt,dtherm,ida,arat,pln,pts
Clock: 2080 MHz
BogoMips: 4788.92
Cache: 3072 kb
Units/Processor: 16
Config Status: cfg=new, avail=yes, need=no, active=unknown
....

9. nproc – Print Number of Processing Units

nproc command is used to show the number of processing unit present on your computer:

$ nproc

For additional usage info and options, read through the man pages of these commands like this:

$ man commandname

Also check out:

  1. Cpustat – Monitors CPU Utilization by Running Processes in Linux
  2. CoreFreq – A Powerful CPU Monitoring Tool for Linux Systems
  3. Find Top Running Processes by Highest Memory and CPU Usage in Linux
  4. How to Impose High CPU Load and Stress Test on Linux Using ‘Stress-ng’ Tool

That’s it for now! You can share with us additional ways of extracting CPU information in Linux via the feedback form below.

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