Why does Linux fail to display cpu information?

The reasons why Linux fails to display cpu information are: 1. If lscpu is not installed, you cannot use this command to view CPU information; 2. If you try to use lscpu under a non-root user, you may receive an error of insufficient permissions. Information; 3. In some virtual machine environments, or possibly as a result of hardware failure, the system may not be able to obtain CPU information.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

Failure to display CPU information may be due to one of the following reasons:

1. lscpu is not installed

If lscpu is not installed, you cannot use the command to view CPU information. Run the following command in the terminal to check whether lscpu is installed:

```
lscpu
```

If the output is "lscpu: command not found", it means you need to install lscpu.

On Debian or Ubuntu, you can install lscpu using the following command:

```
sudo apt-get install util-linux
```

On Fedora, CentOS, or Red Hat Enterprise Linux (RHEL), you can install lscpu using the following command:

```
sudo yum install util-linux
``

2. Insufficient permissions

If you try to use lscpu under a non-root user, you may receive an insufficient permissions error message. To run lscpu with root privileges, use the following command:

```
sudo lscpu
```

3. CPU information is not available

In some cases, the system may not be able to obtain CPU information. This may occur in some virtual machine environments or may be the result of hardware failure. If you can't get the CPU information, you can't use tools like lscpu to view them.

In short, to solve the problem of failure to display CPU information, you may need to install the lscpu package and check whether you have sufficient permissions to run it. If the system cannot obtain CPU information, you will need to troubleshoot the hardware to identify the problem.

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