What action does 'terraform state mv' perform?

The action performed by 'terraform state mv' is specifically designed to move a resource from one location to another within the Terraform state file. This command allows users to adjust the resource's address in the state without affecting the actual infrastructure deployed.

Moving a resource is often necessary during restructuring of modules, renaming resources, or when planning to reorganize the project setup. By using this command, Terraform updates the state file to reflect the changes without having to destroy and recreate the resource, ensuring that the existing resource is preserved and managed correctly under the new address.

In contrast, removing an item from the state or creating a new state file are actions related to different Terraform commands, such as 'terraform state rm' or those that involve the manipulation of state files for backup or cloning purposes. Displaying the state of a specific resource would typically involve 'terraform show' or similar commands that provide information about the resources managed by Terraform, rather than moving them.