Final answer:
To start a container from a Docker image, use the 'docker run' command with the desired image name and parameters. Docker will download the image if it's not available locally and then start a new container from it. Control the container's lifecycle with commands like 'docker stop' and 'docker rm'.
Step-by-step explanation:
To start a container from a Docker image, you first need to have Docker installed on your system. Once you've got that set up, the process is quite straightforward. Open a terminal or command-line interface and use the Docker run command followed by the name of the image. For instance: docker run -d -p 8080:80 --name mycontainer nginx. This command tells Docker to start a new container in detached mode (so it runs in the background), binds port 8080 on your host to port 80 on the container, gives the container a name (mycontainer), and uses the nginx image.
If the image isn't found locally, Docker will attempt to pull it from the Docker Hub or another configured registry. After the image is downloaded, a new container based on that image will start. You can also specify a particular version of an image by adding a tag after the image name. To stop the container, use docker stop mycontainer, and to remove it, use docker rm mycontainer.