Enter the ls command in cmd to see that "ls is not an internal or external command.

When you enter the ls command in cmd, "ls is not an internal or external command to solve the problem. Generally, you prefer to use the command line window cmd. Suddenly, it is easy to use other commands, if you enter the ls command, "ls cannot be an internal or external command" is displayed, but the function similar to this command is dir, so the following method can be solved: In C: \ name a new file in the windows directory ls. bat open and edit the file and enter @ echo off dir to save the two statements.