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. See [FAQ](/train-faq/faq) to solve the problem of terminal connection failure to the server. The TDengine CLI prompts as follows:
```cmd
```
Welcome to the TDengine shell from Linux, Client Version:2.6.0.4
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