# su
## Command Function
This command is used to switch the user.
## Syntax
su \[_uid_\] \[_gid_\]
## Parameters
**Table 1** Parameter description
Parameter
Description
Value Range
uid
Specifies the ID of the target user.
Left blank
[0,60000]
gid
Specifies the ID of the target user group.
Left blank
[0,60000]
## Usage
- The **su** command is used to switch to user **root** by default. The default value for both **uid** and **gid** is **0**.
- If the **uid** and **gid** parameters are specified, this command can switch to the user with the specified **uid** and **gid**.
- If the input parameter is out of the range, an error message will be printed.
## Example
Run **su 1000 1000**.
## Output
**Figure 1** Switching to the user whose **uid** and **gid** are both **1000**
