> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdc-10.2-data-optimizer/pdso-install-landing-page/pdso-install-in-hadoop-cluster/pdso-maintain-landing-page/pdso-ldoctl-command-line-utility.md).

# The ldoctl command line utility

The `ldoctl` Data Optimizer command line utility supports several functions related to monitoring and maintening the Data Optimizer software. These functions include:

* Reloading the configuration file at run time, allows you to apply new configurations without restarting the software.
* Collecting and marking logs, which helps in identifying specific events and tracking the performance or issues.
* Collecting performance metrics, which gives insights into the performance of Data Optimizer, enabling better management and optimization.

You can find the `ldoctl` utility documention in `man` pages and inline help. You can also find examples of how to use this utility throughout the guide.


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