What does the parameter `--noop` do when used with Puppet commands?

The parameter --noop, commonly used in Puppet commands, allows users to run the command in a simulated fashion, ensuring that no actual changes are made to the system. This feature is particularly useful for testing and verification purposes. When the --noop option is invoked, Puppet generates a report of what changes would occur if the command were executed without this parameter, enabling users to preview potential modifications to the system's configuration.

This simulated run provides insight into what Puppet would attempt to change, helping administrators to identify issues or validate expected behavior before committing to actual changes. This capability is crucial in scenarios where it’s necessary to avoid unintended consequences or outages that may arise from direct modifications. Thus, the use of --noop facilitates safer management and better understanding of Puppet’s operational impact.