ls is a Linux operating system command, which stands for list. It is used to list all files and subdirectories in a specified directory. This command supports many parameters to display more comprehensive information, such as file size, permissions, date, etc. At the same time, ls also supports different colors to mark different types of files.

The ls command is commonly used to find files and directories. When we need to find a file or folder in our work, we can use the ls command to list all files and folders in the current directory to help us quickly locate the file we need. We can add relevant parameters or operators after the directive to help filter, sort, or other operations to obtain clearer information.

The ls command is also one of the commands used when writing Shell scripts. When we need to write automated scripts or batch scripts, we can use the ls command to read file and folder information in the specified directory for statistics, filtering, deletion or other operations. Because this command is simple and convenient to use, it is widely used in various scripting tasks.