This article is for showing how to list docker container. The main purpose is to show all available docker container in the operating system. It can be a running container or a container which in not running at all. The following are the steps to achieve it :
1. Obviously, the most important thing is having an installation of the docker tool in the operating system. For the information on installing docker, read the following article with the title of ‘How to Install Docker in Linux Ubuntu 18.04 Bionic Beaver’ in this link.
2. Make sure that the execution of the docker tool is a success. Type the command ‘docker’ in the command line as follows :
user@hostname:~$ docker Usage: docker [OPTIONS] COMMAND A self-sufficient runtime for containers Options: --config string Location of client config files (default "/home/user/.docker") -D, --debug Enable debug mode -H, --host list Daemon socket(s) to connect to -l, --log-level string Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info") --tls Use TLS; implied by --tlsverify --tlscacert string Trust certs signed only by this CA (default "/home/user/.docker/ca.pem") --tlscert string Path to TLS certificate file (default "/home/user/.docker/cert.pem") --tlskey string Path to TLS key file (default "/home/user/.docker/key.pem") --tlsverify Use TLS and verify the remote -v, --version Print version information and quit Management Commands: builder Manage builds config Manage Docker configs container Manage containers engine Manage the docker engine image Manage images network Manage networks node Manage Swarm nodes plugin Manage plugins secret Manage Docker secrets service Manage services stack Manage Docker stacks swarm Manage Swarm system Manage Docker trust Manage trust on Docker images volume Manage volumes Commands: attach Attach local standard input, output, and error streams to a running container build Build an image from a Dockerfile commit Create a new image from a container's changes cp Copy files/folders between a container and the local filesystem create Create a new container deploy Deploy a new stack or update an existing stack diff Inspect changes to files or directories on a container's filesystem events Get real time events from the server exec Run a command in a running container export Export a container's filesystem as a tar archive history Show the history of an image images List images import Import the contents from a tarball to create a filesystem image info Display system-wide information inspect Return low-level information on Docker objects kill Kill one or more running containers load Load an image from a tar archive or STDIN login Log in to a Docker registry logout Log out from a Docker registry logs Fetch the logs of a container pause Pause all processes within one or more containers port List port mappings or a specific mapping for the container ps List containers pull Pull an image or a repository from a registry push Push an image or a repository to a registry rename Rename a container restart Restart one or more containers rm Remove one or more containers rmi Remove one or more images run Run a command in a new container save Save one or more images to a tar archive (streamed to STDOUT by default) search Search the Docker Hub for images start Start one or more stopped containers stats Display a live stream of container(s) resource usage statistics stop Stop one or more running containers tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE top Display the running processes of a container unpause Unpause all processes within one or more containers update Update configuration of one or more containers version Show the Docker version information wait Block until one or more containers stop, then print their exit codes Run 'docker COMMAND --help' for more information on a command. user@hostname:~$
It can be run as a normal user or as a root or super user account of the operating system.
3. Last but not least, type the ‘docker’ command with the additional parameter for listing all the available container as follows :
docker ps -a
The execution of the above command will have the following output and don’t forget o run it as ‘root’ or super admin account. If it is running as a normal account it will generate an error as exist in an article in the following link. It is an article with the title of ‘How to solve error message Got permission denied while trying to connect to the Docker daemon socket’. The following is the output of the ‘docker ps -a’ command running as a ‘root’ or super user account :
root@hostname:~# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0b4fc76de6c2 app "php index.php" 2 days ago Exited (0) 2 days ago test cd9384edb3d3 app "php index.php" 2 days ago Exited (0) 2 days ago app 78a60b523b4d 24d1a55b737d "/bin/sh -c 'apt-get…" 3 days ago Exited (100) 3 days ago xxxxxxx_xxxxxx root@hostname:~#