Docker run
Genral form
docker run [OPTIONS] IMAGE[:TAG|@DIGEST] [COMMAND] [ARG...]
An image developer can define image defaults related to:
- detached or foreground running
- container identification
- network settings
- runtime constraints on CPU and memory
Operator exclusive options
Detached vs foreground
-din detached mode; Detached mode: Run container in the background, print new container id. By design, containers started in detached mode exit when the root process used to run the container exits, unless you also specify the--rmoption- foreground is default;
Container identification
If you do not assign a container name with the --name option, then the daemon generates a random string name for you. Defining a name can be a handy way to add meaning to a container
PID equivalent
Image[:tag]
While not strictly a means of identifying a container, you can specify a version of an image you’d like to run the container with by adding image[:tag] to the command. For example, docker run ubuntu:14.04.