List containers with `docker ps`

In order to see all of your provisioned Docker containers, running and stopped, you can run docker ps -a. The -a modifier is what ensures all containers are listed.

$ docker ps -a
Executing in <data center> (via env var; use `eval "$(triton env <profile name>)"` to change) at 01:47:29 PM
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                    PORTS                         NAMES
828ef84a23d0        nginx               "nginx -g 'daemon off"   3 days ago          Exited (0) 25 hours ago   0.0.0.0:80->80/tcp, 443/tcp   ecstatic_stallman
78de959d7c96        ubuntu              "/bin/bash"              3 days ago          Exited (0) 3 days ago                                   compassionate_goodall
27d747a35429        ubuntu              "/bin/bash"              2 days ago                                                                  cranky_jepsen

On Triton, docker ps is similar to triton instances, although docker commands will only return your Docker containers and triton instances will show all of your containers and VMs.