How to check the number of CPU cores and usage in Linux?

2 years ago
Ava Mitchell
1 minute

To check the number of CPU cores in a Linux system, you can use the following command:

  1. Check the number of CPU cores:
  2. Count the number of processors listed in the CPU information file.
  3. View CPU usage:
  4. View real-time CPU usage using the top command.

    Press the number 1 key in the top command interface to display the usage of each CPU core.

  5. Check the CPU usage with the mpstat command:
    mpstat -P ALL
  6. Check the CPU usage with the sar command:
    sar -u
  7. Check the CPU usage using the pidstat command:
    pidstat -u

In the above commands, the -l option is used to specify the output information level, and the -u option is used to specify the output CPU usage rate. Choose the appropriate command and option to view the CPU usage rate according to actual needs.

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