docker.md

Docker

Links

Name	Link
Docker Command Line Documentation	https://docs.docker.com/engine/reference/commandline/docker/

Show docker containers

# Show all active containers
docker ps

# Show all active and non-active containers
docker ps -a

Download an image (if it hasn't been previously downloaded) and start a container based on it

# Run the latest version
docker run <image name>

# Specify the version to run
docker run <image name>:<version number>
# Example
docker run ubuntu:17.04

# Run the docker container in detach mode (prevent the terminal window from locking up while the container is running)
docker run -d <image name>
# Attach back to a container
docker attach <container id or name>

Download an image for later use

docker pull <image name>

Stop a docker container

docker stop <container id or name>

Remove a stopped container

# Remove a single container
docker rm <container id or name>

# Remove multiple containers
docker rm <container id or name> <container id or name> <container id or name>

# Alternatively, only the first three letters of the container id need to be provided
docker rm 345 a0b 773

List all images that have previously been downloaded from Docker Hub

docker images

Remove a previously downloaded image

docker rmi <image name>

Execute a command in the container

docker exec <container id or name> <command>
# Example (print contents of file)
docker exec 3eed277c1318 cat /etc/hosts

Start a container and open the shell

docker run -it <image name> <command>
# Example
docker run -it ubuntu bash

View the release details of the OS in the container

cat /etc/*release*

Exit out of shell inside container

exit