How to check how many CPUs are there in Linux system
Last Updated :
26 Apr, 2025
In this article, we will discuss how to check CPU information in a Linux system. In the Linux system, the main configuration file of the CPU and system architecture is stored at /proc/cpuinfo. With the help of the cat, nano command we can view the CPU configuration file. This helps a lot in getting process management and manufacturing names.
How to check how many CPUs are there in the Linux system
To check the CPU information, we have some command utilities that can be used to display the CPU details and relevant information.
1. lscpu command
The lscpu command is the primary utility that displays CPU details such as CPU op-mode, vendor id, model name, CPU family, etc. it fetches the CPU architecture's information from sysfs and /proc/cpuinfo.
lscpu
2. /proc/cpuinfo
The configuration file displays information like vendor_id, CPU family, model, model name, microcode, etc.
nano /proc/cpuinfo
3. nproc command
The nproc command displays the total number of core processors installed in the Linux system and current processes. This command helps in the analysis of the computer system.
nproc
4. top or htop command
The htop command displays the processes used by different users in proper detail such as priority, nice value, virtual memory, shared memory, etc.
htop
top
5. hwinfo
It is free software that quickly gives an overview of hardware components in a detailed manner.
hwinfo --cpu
6. dmidecode command
It is used to get the information about Processor, RAM, Memory, Serial number, etc.
dmidecode -t 2
7. getconf _NPROCESSORS_ONLN command
This command displays the actual CPU cores used by the Linux operating system.
Conclusion
This article describes how to get information on the CPU in Linux operating system. We also discuss the main configuration file and their respective command which helps in getting the details about the CPU. We can also read the manual page of any command to know more in detail, for example, man lscpu.
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