Curious about the brain of your computer? What kinds of architecture it has, and how many CPU cores it has? Who's the manufacturer? What's the model?
There are all kinds of processor information you can look for. And there are various kinds of commands and tools available for this purpose. Some of them show detailed output while some show only the essential ones.
As you can guess, this tutorial is about the hardware details, not CPU utilization.
Let me share various ways you can get processor details in Ubuntu command line.
Using lscpu command
The lscpu utility gathers CPU architecture info from sysfs and /proc/cpuinfo and can be found on most of the Linux distros.
And I use
lscpu quite often with my VMs as you get few cores:
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 45 bits physical, 48 bits virtual
Byte Order: Little Endian
On-line CPU(s) list: 0,1
Vendor ID: GenuineIntel
Model name: 12th Gen Intel(R) Core(TM) i5-12400
CPU family: 6
Thread(s) per core: 1
Core(s) per socket: 1
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mc
a cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall n
x pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good
nopl xtopology tsc_reliable nonstop_tsc cpuid tsc_known
_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x
2apic movbe popcnt tsc_deadline_timer aes xsave avx f16
c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fau
lt invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced fs
gsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdse
ed adx smap clflushopt clwb sha_ni xsaveopt xsavec xget
bv1 xsaves arat umip pku ospke gfni vaes vpclmulqdq rdp
id movdiri movdir64b fsrm md_clear flush_l1d arch_capab
Hypervisor vendor: VMware
Virtualization type: full
Caches (sum of all):
L1d: 96 KiB (2 instances)
L1i: 64 KiB (2 instances)
L2: 2.5 MiB (2 instances)
L3: 36 MiB (2 instances)
NUMA node(s): 1
NUMA node0 CPU(s): 0,1
Itlb multihit: KVM: Mitigation: VMX unsupported
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Retbleed: Not affected
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer
Spectre v2: Mitigation; Enhanced IBRS, IBPB conditional, RSB fillin
g, PBRSB-eIBRS SW sequence
Srbds: Not affected
Tsx async abort: Not affected
As you can see, it goes in too much details on the CPU. It tells you the architecture, number of cores, manufacturer and a lot more details that you may not be interested in.
Checking the contents of /proc/cpuinfo file
You are not obligated to use the lscpu command. After all, it reads from the /proc/cpuinfo file so why not read it directly?
It gets you info related to individual cores making it too long to read. But you can filter the results to get the relevantinfo.
To get view the vendor name:
cat /proc/cpuinfo | grep 'vendor' | uniq
sagar@Learnubuntu:~$ cat /proc/cpuinfo | grep 'vendor' | uniq
vendor_id : GenuineIntel
To display model name:
cat /proc/cpuinfo | grep 'model name' | uniq
sagar@Learnubuntu:~$ cat /proc/cpuinfo | grep 'model name' | uniq
model name : 12th Gen Intel(R) Core(TM) i5-12400
To count the number of processing units:
cat /proc/cpuinfo | grep processor | wc -l
sagar@Learnubuntu:~$ cat /proc/cpuinfo | grep processor | wc -l
Using dmidecode command
The dmidecode command gets the hardware info on Linux by dumping the computer's DMI (SMBIOS) table contents in a human-readable format.
While it avails users a variety of info, I will only fetch the CPU info by the given command:
sudo dmidecode --type processor
Using inxi utility
The inxi is a script made for getting system info through the command line.
Though it does not come pre-installed in Ubuntu, you can easily install it.
sudo apt install inxi
As I'm only looking for CPU info, the intended results can be found by using
The cpuid commands will get every detail collected by CPUID instruction and can also discover the exact model of x86 CPU(s).
Ubuntu users can utilize the given command to install cpuid:
sudo apt install cpuid
And it can be executed by:
Using lshw command
As its name suggests, the lshw utility is intended to list the hardware configuration of your system.
But I'm looking for CPU-specific details so the output can be filtered using
-C option appending with CPU:
sudo lshw -C CPU
Like the lshw command that I mentioned just above, the hwinfo command also gets the hardware details including CPU (of course).
But you have to go through the manual installation as it does not come pre-installed:
sudo apt install hwinfo
To get CPU info only, you just have to pair the hwinfo command with
Get the Number of Cores using nproc
If you are curious to know just the number of cores present in your system, then the nproc command will do the job.
This guide was a compilation of how you can get CPU info using different utilities. And the comments section welcomes you for queries!