docker kill | Docker Documentation
https://docs.docker.com/engine/reference/commandline/killExtended description. The docker kill subcommand kills one or more containers. The main process inside the container is sent SIGKILL signal (default), or the signal that is specified with the --signal option. You can reference a container by its ID, ID-prefix, or name. The --signal (or -s shorthand) flag sets the system call signal that is sent to the container.