Peter Walker
Peter Walker

Peter Walker

Intro Docker Commands

Intro Docker Commands

Quick way to get started with Docker post install

Peter Walker's photo
Peter Walker
·Feb 22, 2021·

2 min read

Installing docker is easy and well documented at Docker Docs. Here are some quick commands you can use to get started with Docker containers.

Getting Started

  • Docker version:
    docker --version
    
  • Check that Docker is working by running the hello-world container:
    docker run hello-world
    
  • List all images that are locally stored:
    docker image ls
    

Starting a Container

  • Start a Docker container
    docker container run --name <Name of container>
    
  • Run docker container in interactive mode
    docker run -it --name my-container image_id_here
    
  • List Docker containers (running and stopped):
    docker container ls --all
    
  • Start container and map a local OS port to docker port
    docker run -d -p 80:80 nginx
    
  • Start a container and map a service port to a random port
    docker run -d -P nginx
    

Image Management

  • Pull an image from Docker Hub:
    docker pull <user_name>/<repo_name>:<version_v1>
    
  • Push an image to Docker Hub:
    docker push <user_name>/<repo_name>:<version>
    
  • Tag a container
    docker tag <image_id> peteawalk/<name_of_repo>:v1
    
  • Pull an image from Docker Hub registry:
    docker pull alpine:3.4
    
  • Delete an image from the local image store:
    docker image rm alpine:3.4
    

Container Management

  • Look for all containers running or exited:
    peterconqueso@pop-os:~$ docker ps -a
    CONTAINER ID   IMAGE          COMMAND                  CREATED        STATUS                      PORTS     NAMES
    8a9c5b104898   40afe17d4955   "/sbin/tini -- /usr/…"   24 hours ago   Exited (129) 23 hours ago             jenkins
    
  • Access Docker container with bash shell:
    docker exec -it <Name of container> /bin/bash
    
  • Run a quick command (file system sizing) in container without accessing container:
    docker exec -it <Name of container> df -hP
    
  • Look at container information, such as state, image, config
    docker container inspect <container_id>
    
  • Grab docker container IP Addres
    docker container inspect <container_id> | grep IPAdd
    
  • Remove unused containers
    docker container rm <container_id>
    
  • Remove all stopped and exited containers AND free up disk space:
    docker container prune
    
 
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