Check how many CPU cores on Windows and on Linux

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How to check how many CPU cores I have on Windows & Linux?

What is a core in a CPU?
In summary, a core is a small CPU or processor built into a big CPU or CPU socket. It can independently perform or process all computational tasks. From this perspective, we can consider a core to be a smaller CPU or a smaller processor within a big processor.
Today, CPUs have been two and 18 cores, each of which can work on a different task. A core can work on one task, while another core works a different task, so the more cores a CPU has, the more efficient it is.

Open a command prompt (Windows) or Terminal (Linux) and type:

  • Windows: WMIC CPU Get /Format:List
  • Linux: cat /proc/cpuinfo | grep processor | wc -l
    For more details on Linux: ls /sys/devices/system/cpu/

What does 4 CPU cores mean?
A quad-core CPU has four processing cores in a single chip. It is similar to a dual-core CPU, but has four separate processors (rather than two), which can process instructions at the same time.