Linux get number of processors

Last updated on November 18th, 2022 at 10:44 am

Quick guide on counting the number of processors in Linux server

Using cpuinfo file

Simple command to find the number of processor in linux.

Run

cat /proc/cpuinfo | grep processor|wc -l

Try to run the command as root, it might throw you a permission denied if you run as a normal user. This command will give you the total number of processor installed on the server.

Using lscpu Command

lscpu displays the information about CPU architecture. It gathers information from sysfs,/proc/cpuinfo file and other libraries and output the details in human readable format, output truncated

$ sudo lscpu
Architecture:           aarch64
  CPU op-mode(s):       32-bit, 64-bit
  Byte Order:           Little Endian
CPU(s):                 1
  On-line CPU(s) list:  0
Vendor ID:              ARM
  Model name:           Neoverse-N1
    Model:              1
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    Stepping:           r3p1
    BogoMIPS:           243.75
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asim
                        ddp ssbs
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