---
title: TDengine Command Line (CLI)
sidebar_label: TDengine CLI
description: Instructions and tips for using the TDengine CLI to connect TDengine Cloud
---

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The TDengine command-line interface (hereafter referred to as `TDengine CLI`) is the most simplest way for users to manipulate and interact with TDengine instances.

## Installation

To run TDengine CLI to access TDengine cloud, please download and install recent [TDengine client installation package](https://docs.tdengine.com/releases/tdengine/) first.

## Config

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<TabItem value="linux" label="Config on Linux">

Run this command in your Linux terminal to save cloud DSN as variable:

```bash
export TDENGINE_CLOUD_DSN="<DSN>"
```

</TabItem>
<TabItem value="windows" label="Config on Windows (beta)" groupId="sys">

Run this command in your Windows CMD prompt to save cloud DSN as variable:

```cmd
set TDENGINE_CLOUD_DSN=<DSN>
```

Or run this command in your Windows PowerShell environment to save cloud DSN as variable:

```cmd
$env:TDENGINE_CLOUD_DSN='<DSN>'
```

</TabItem>
<TabItem value="mac" label="Config on Mac (beta)" groupId="sys">

Run this command in your Mac terminal to save cloud DSN as variable:

```bash
export TDENGINE_CLOUD_DSN="<DSN>"
```

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:::note
To obtain the value of cloud DSN, please log in [TDengine Cloud](https://cloud.tdengine.com) and click "Tools" and then select "TDengine CLI".

:::
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## Connect 

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To access the TDengine Cloud, you can execute `taos` if you already set the environment variable.

```
taos
```

If you did not set environment variable for a TDengine Cloud instance, or you want to access other TDengine Cloud instances rather than the instance you already set the environment variable, you can use `taos -E <DSN>` as below.

```
taos -E $TDENGINE_CLOUD_DSN
```

</TabItem>
<TabItem value="windows" label="Connect on Windows (beta)">

To access the TDengine Cloud, you can execute `taos` if you already set the environment variable.

```
taos
```

If you did not set environment variable for a TDengine Cloud instance, or you want to access other TDengine Cloud instances rather than the instance you already set the environment variable, you can use `taos -E <DSN>` as below.

```
taos.exe -E $TDENGINE_CLOUD_DSN
```

</TabItem>
<TabItem value="mac" label="Connect on Mac (beta)">

To access the TDengine Cloud, you can execute `taos` if you already set the environment variable.

```
taos
```

If you did not set environment variable for a TDengine Cloud instance, or you want to access other TDengine Cloud instances rather than the instance you already set the environment variable, you can use `taos -E <DSN>` as below.

```
taos -E $TDENGINE_CLOUD_DSN
```

</TabItem>
</Tabs>

## Using TDengine CLI

TDengine CLI will display a welcome message and version information if it successfully connected to the TDengine service. If it fails, TDengine CLI will print an error message. The TDengine CLI prompts as follows:

```
Welcome to the TDengine shell from Linux, Client Version:3.0.0.0
Copyright (c) 2022 by TAOS Data, Inc. All rights reserved.

Successfully connect to cloud.tdengine.com:8085 in restful mode

taos>
```

After entering the TDengine CLI, you can execute various SQL commands, including inserts, queries, or administrative commands. Please see the [official document](https://docs.tdengine.com/reference/taos-shell#execute-sql-script-file) for more details.

