> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Command-line arguments

> Available command-line arguments for the OPC Classic extractor.

| Option            | Description                                                                                                                                                                           |
| ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| --config-file\|-f | Override location of the YAML configuration file. This can be a relative or absolute path.                                                                                            |
| --log-level\|-l   | Set the console log level. Valid options are `verbose`, `debug`, `information`, `warning`, and `error`.                                                                               |
| --working-dir\|-w | Set the working directory of the extractor. The default value is the current directory for standalone, or one level above the executable file for the service version.                |
| --log-dir         | Set the path to log files to enable logging to file.                                                                                                                                  |
| --service\|-s     | Required when starting the extractor as a service. This option won't start the extractor as a service on its own, but makes the necessary modifications when it is called by Windows. |
| --version         | Show the current extractor version.                                                                                                                                                   |
| -?\|--h\|--help   | Show the available command line options.                                                                                                                                              |