How can you check if Docker is installed correctly on your machine?

The command to determine if Docker is installed correctly on your machine is to run docker --version. This command provides you with the version of Docker that is currently installed. If Docker is installed correctly, it will return the version number along with some additional information about the Docker build.

Using this command is a straightforward method to verify the installation because it not only confirms that Docker is present but also indicates that it is functioning properly, as it can provide versioning information. If Docker were not installed, attempting to run this command would result in an error message indicating that the command is not recognized.

The other options do not correspond to valid Docker commands that can confirm the installation status. For instance, docker status, docker check, and docker verify are not recognized Docker commands, meaning they would not yield useful information regarding whether Docker is correctly installed or operational on your system. This makes the command docker --version the best choice for verifying a successful installation of Docker.