The ipconfig command cannot be run in DOS.

I even know that ipconfig is a Windows system command. In fact, it indicates that an executable file of .exe is used. It can be said that all DOS commands correspond to corresponding execution files. These files are generally stored in
C:/Windows/system32 folder. As we usually input DOS commands in the DOS window, the system will call the corresponding files in the above directory. So how does the system know to go to C:/Windows/system32 to find it? In fact, this involves a system variable. The so-called system variable is simply a character name, which is used to save the path addresses of some specially intended files. Use the path character in Windows
Path stores many file paths. When a file is executed, the system searches for the paths contained in the path. Generally, the first path is found.

Therefore, if the system variable encounters a problem, the corresponding file cannot be found, so the system prompts "No or external commands ".

Solution:
My computer → properties → advanced "tab's" environment variable "button to view relevant information.

The blue part is the content corresponding to the path.
If you do not have the path option, click "new" and enter "path" as the variable name"
Enter "C:/Windows/system32" as the variable value"
If you already have a path attribute, you can add the character "; C:/Windows/system32" after the content to solve the problem.

 

 

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