Docker cheatsheet

Here is a Docker CheatSheet covering all the core Docker instructions:

Docker Installation

Install Docker on Linux

curl -sSL https://get.docker.com/ | sh

Start Docker

systemctl start docker

Stop Docker

systemctl stop docker

Docker Lifecycle

Pull (Download) Docker Image fedora

docker pull fedora

Search image fedora

docker search fedora

 Run Image

docker run fedora

Run image and removes container when stopped

docker run --rm fedora

Run an image fedora and start a tty

docker run -t -i fedora /bin/bash  

Run a shell on a running container

docker exec -t -i <mycontainer> /bin/bash 

Run a shell on the last container started:

docker exec -it  $(docker ps -q) bash

Build an image on the current directory from a Dockerfile

docker build .

Delete an image

docker rmi <myimage>

Attach to a running Container

docker attach <container>

 See the logs of a Container

docker logs <container>

List active containers

docker ps -l

List available images

docker images

Stop all containers

docker stop $(docker ps -a -q)

Volumes

Map a directory on the host to a docker container

docker run -v $HOSTDIR:$DOCKERDIR

Ports and IPs

Expose Container Ports to Host

docker run -p 127.0.0.1:$HOSTPORT:$CONTAINERPORT --name CONTAINER -t someimage

Check Mapped port

docker port CONTAINER $CONTAINERPORT

Get the IP Address of the last Container started:

docker inspect --format '{{ .NetworkSettings.IPAddress }}' $(docker ps -q)

Check any container's IP Address:

docker inspect -f '{{ .NetworkSettings.IPAddress }}' <container_name>

 Link Containers

Step 1: Start first CONTAINER

docker run --name CONTAINER

Step 2: Start LINKED container

docker run -d --link CONTAINER:ALIAS --name LINKED <myimage>

 Cleanup

Kill running containers

docker kill $(docker ps -q)

Delete old containers

docker ps -a | grep 'weeks ago' | awk '{print $1}' | xargs docker rm

Delete stopped containers

docker rm -v `docker ps -a -q -f status=exited`

Delete dangling images

docker rmi $(docker images -q -f dangling=true)

Delete all images

docker rmi $(docker images -q)

 




Advertisement

Cookie Alert