What command should be executed to rerun a script in a local-exec provisioner?

To rerun a script in a local-exec provisioner, the most appropriate command is to taint the resource. When you taint a resource, it marks it for recreation during the next apply. With local-exec provisioners, this means that the associated script will be executed again when the resource is recreated.

Using the taint command prompts Terraform to consider the resource as needing to be updated, leading to the execution of the provisioner as part of the subsequent apply process. This is particularly useful when you need to ensure that certain scripts are rerun due to changes in the environment or simply to enforce the execution of provisioning actions again.

The other commands would not accomplish the same goal. For example, applying or planning would not specifically signal that a resource should be recreated solely to run the provisioner script. Refreshing updates the state but does not change any resources or rerun provisioners. Thus, tainting is the specific action necessary to invoke the local-exec provisioner script anew.