# ls
## Command Function
This command is used to display the content of a specified directory.
## Syntax
ls \[_path_\]
## Parameters
**Table 1** Parameter description
Parameter
Description
Value Range
path
If path is left blank, the content of the current directory is displayed.
If the path value is an invalid file name, the following failure message is displayed:
ls error: No such directory
If the path value is a valid directory, the content of this directory is displayed.
Left blank
A valid directory
## Usage
- This command can be used to display the content of the current directory.
- This command can also display the size of a file.
- The **ls** command with the **proc** directory passed cannot calculate the file size, and **0** is displayed in the command output.
## Example
Run **ls**.
## Output
**Figure 1** Displaying content of the current directory
