How to know number of cores of a system in Linux?

kernel_kate

I wanted to find out how many cores my system has, so I searched the same question in Google. I got some commands such as the lscpu command. When I tried this command, it gave me the following result: $ lscpu 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: 1...

Originally asked by Achyuth23 on Stack Exchange (unix) (CC BY-SA 4.0).

uphilltech

Good Linux question — answering as the UphillTech team:

To get a complete picture you need to look at the number of threads per core, cores per socket and sockets . If you multiply these numbers you will get the number of CPUs on your system. CPUs = Threads per core X cores per socket X sockets CPUs are what you see when you run htop (these do not equate to physical CPUs). Here is an example from a desktop machine: $ lscpu | grep -E '^Thread|^Core|^Socket|^CPU(' CPU(s): 8 Thread(s) per core: 2 Core(s) per socket: 4 Socket(s): 1 And a server: $ lscpu | grep -E '^Thread|^Core|^Socket|^CPU(' CPU(s): 32 Thread(s) per core: 2 Core(s) per socket: 8...

Full answer by htaccess: https://unix.stackexchange.com/a/279354 (CC BY-SA 4.0).

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