Which Terraform command is used to validate configurations?

The command used to validate configurations in Terraform is indeed "terraform validate." This command checks the syntax and validity of configuration files without actually interacting with any real infrastructure. It ensures that the configuration is well-formed and adheres to the required syntax, making it an essential step before applying changes or running further commands.

By using "terraform validate," users can quickly identify any errors in their configurations, such as typos, missing arguments, or incorrect resource definitions. This preventive measure helps avoid potential issues that could arise when executing commands that make changes to infrastructure.

Other commands like "terraform plan" and "terraform apply" have different purposes; "terraform plan" is used to create an execution plan showing what changes will occur when applying configurations, while "terraform apply" is the command responsible for applying those changes to the infrastructure. "terraform check" is not a valid Terraform command, and therefore it doesn’t serve any purpose in the context of configuration validation.