# SHELL Command
[GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [S](Help%20System/GSTARCAD/2027/Commands/S/(S).md)
## Function Description:
This command is used to visit operating system commands.
Under the SHELL command prompt, most valid OS commands can be entered. When the command has been executed, it returns to the command prompt. Pressing Enter key under the SHELL command prompt, it displays the system prompt with an extra close angle bracket (>). Users can enter OS commands as usual.
**Warning:** Please do not use the SHELL command to delete locked files (with ".??k" extension) or temporary files (with ".ac
quot; extension or ".$ a" extension). Please do not do the following operations when editing drawings saved on removable media, running chkdsk by the SHELL command, resetting serial I/O ports or running external programs when needed to disk exchange.
## Command Access:
> **Icon:** /
> **Menu:** /
> **Ribbon:** /
> **Toolbar:** /
> **Command:** SHELL
> **Alias:** /
## Command Prompts:
```
OS Command:
```
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**Related References：**
- [Commands about Customization (GstarCAD 2026)](../../../2026/Commands/00%20Command%20Groups/Commands%20about%20Customization.md)
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[Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_S/SHELL.html) · © Gstarsoft Co., Ltd.