Docker Cheatsheet

Minimal Workflow

docker init
docker compose up --build
docker compose up --build -d #run_in_background
docker compose down #stop

Name	Command
Starting Containers	docker container start nginx
Stopping Containers	docker container stop nginx
Restarting Containers	docker container restart nginx
Pausing Containers	docker container pause nginx
Unpausing Containers	docker container unpause nginx
Blocking a Container	docker container wait nginx
Sending SIGKILL Containers	docker container kill nginx
Sending another signal	docker container kill -s HUP nginx
Connecting to an Existing Container	docker container attach nginx
Check the Containers	docker ps
To see all running containers	docker container ls
Container Logs	docker logs infinite
‘tail -f’ Containers’ Logs	docker container logs infinite -f
Inspecting Containers	docker container inspect infinite
Inspecting Containers for certain	docker container inspect –format ‘{{ .NetworkSettings.IPAddress }}’ $(docker ps -q)
Containers Events	docker system events infinite
docker system events infinite	docker container port infinite
Running Processes	docker container top infinite
Container Resource Usage	docker container stats infinite
Inspecting changes to files or directories on a container’s filesystem	docker container diff infinite

Name	Command
Listing Images	docker image ls
Building Images	docker build.
From a Remote GIT Repository	docker build github.com/creack/docker-firefox
Instead of Specifying a Context, You Can Pass a Single Dockerfile in the URL or Pipe the File in via STDIN	docker build – < Dockerfile
Building and Tagging	docker build -t eon/infinite.
Building a Dockerfile while Specifying the Build Context	docker build -f myOtherDockerfile.
Building from a Remote Dockerfile URI	curl example.com/remote/Dockerfile\|docker build -f – .
Removing an Image	docker image rm nginx
Loading a Tarred Repository from a File or the Standard Input Stream	docker image load < ubuntu.tar.gz
Saving an Image to a Tar Archive	docker image save busybox > ubuntu.tar
Showing the History of an Image	docker image history
Creating an Image From a Container	docker container commit nginx
Tagging an Image	docker image tag nginx eon01/nginx
Pushing an Image	docker image push eon01/nginx

Name	Command
Removing a Running Container	docker container rm nginx
Removing a Container and its Volume	docker container rm -v nginx
Removing all Exited Containers	docker container rm $(docker container ls -a -f status=exited -q)
Removing All Stopped Containers	docker container rm `docker container ls -a -q`
Removing a Docker Image	docker image rm nginx
Removing Dangling Images	docker image rm $(docker image ls -f dangling=true -q)
Removing all Images	docker image rm $(docker image ls -a -q)
Removing all Untagged Images	docker image rm -f $(docker image ls \\|grep “^”\\|awk “{print$ 3}”)
Stopping & Removing all Containers	docker container stop $(docker container ls -a -q) && docker container rm$ (docker container ls -a -q)
Removing Dangling Volumes	docker volume rm $(docker volume ls -f dangling=true -q)
Removing all unused (containers, images, networks and volumes)	docker system prune -f
Clean all	docker system prune -a

Command	Description	Example
FROM	Specifies the base image for the build	FROM ubuntu:latest
RUN	Executes a command inside the container during build time	RUN apt-get update && apt-get install -y curl
CMD	Specifies the default command to run when the container starts	CMD [“npm”, “start”]
EXPOSE	Informs Docker that the container listens on specific network ports at runtime	EXPOSE 80/tcp
ENV	Sets environment variables inside the container	ENV NODE_ENV=production
COPY	Copies files or directories from the build context into the container	COPY app.js /usr/src/app/
ADD	Similar to COPY but supports additional features like URL retrieval and decompression	ADD https://example.com/file.tar.gz /usr/src/
WORKDIR	Sets the working directory for subsequent instructions	WORKDIR /usr/src/app
ARG	Defines variables that users can pass at build-time to the builder with the docker build command	ARG VERSION=1.0
ENTRYPOINT	Configures a container to run as an executable	ENTRYPOINT [“python”, “app.py”]
VOLUME	Creates a mount point and assigns it to a specified volume	VOLUME /data
USER	Sets the user or UID to use when running the image	USER appuser
LABEL	Adds metadata to an image in the form of key-value pairs	LABEL version=”1.0″ maintainer=”John Doe
ONBUILD	Configures commands to run when the image is used as the base for another build	ONBUILD ADD . /app/src

Command	Description	Example
volume create	Creates a named volume	docker volume create mydata
volume ls	Lists the available volumes	docker volume ls
volume inspect	Displays detailed information about a volume	docker volume inspect mydata
volume rm	Removes one or more volumes	docker volume rm mydata
volume prune	Removes all unused volumes	docker volume prune