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Display Number of Processors on Linux

If you’ve just upgraded your Linux box, or you are wondering how many processors a remote server has, there’s a quick command you can use to display the number of processors.

On Linux, /proc/cpuinfo contains all of the processor information for all current processors in your computer. This will include the speed, the amount of on-chip cache, processor type, and how many cores.

Here’s the command:
cat /proc/cpuinfo | grep processor | wc -l
The command just looks in the /proc/cpuinfo file, pulls out the number of lines containing the word “processor” and passes them into wc (word count), which returns a count of the CPUs in the system.

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