General Docker Information

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To preface this page; I personally recommend trying out Portainer, which is essentially a web GUI for Docker - it's great. Portainer even lives in a docker container itself.

Regarding images and container management; the contents of this page are great if you're working with a small number of containers that are being installed/setup as a one-off then this is all fine, however, if you're launching containers for applications that need to be updated, changed/customised etc then you're probably best off taking a look at the Docker Compose page.

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Installation

https://docs.docker.com/engine/install/

1. Configure Docker repo (See above link)

2. Install Docker CE (Community Edition)

apt install docker.io

Alternatively, there is a script to perform an automated installation of Docker; Again, see above link.

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Commands & Usage

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Managing Containers

List Docker processes/containers (running and stopped)

docker ps -a

Start a container

docker start containername

stop a container

docker stop containername

Delete a container

docker rm containername

Check container performance metrics

docker stats containername

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Adding new docker images

Docker has their own 'marketplace' of sorts for docker images:

https://hub.docker.com/

To install a new docker image

docker pull container-name

List installed Docker images

docker images

Search locally installed images, and search Docker repository for available images

docker search name

Launching Containers

Basic launch for a container based on an image

docker run --name containername -it imagename

There are lots and lots of options available for the docker run command:

Starting an instance with this method will push your shell into the container itself. To exit the container (continues running):

ctrl+p ctrl+x

To connect to a docker image:

docker attach containername

To connect to a docker image CLI:

docker exec -it containername bash

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