Docker Cheat Sheet by pratikshahp

apt update

Updates the package sources with the latest versions

systemctl start docker

Stop docker services

systemctl restart docker

Stop and start docker services

docker container create --name web -it alpine sh

Create a named container

docker container stop web

Stop a container

docker container run -it --name myweb alpine sh

create and start a named container

docker container attach myweb

Attach to a running container

docker container rename myweb myalpine

Change the name of a container

docker container run -it -w /var --rm alpine sh

Set the current working directory

docker container exec myalpine [command]

Create any process inside an already running container

docker version

prints the current version number

docker login

Log in to a DockerHub registry

docker inspect [object]

Display detailed inform­ation on one or more objects.

docker image [option]

To work with images

docker volume [option]

To work with volumes

docker image ls

List of images

docker container ls

List of running containers

docker container ls -q

Get only the containers IDs of containers

docker network ls

List of networks

docker search nginx

List the available images on DockerHub

docker image pull myregi­str­y.c­om:­808­0/a­lpi­ne:­latest

Pull an image from a private registry

docker image build -t php/al­pin­e:d­ock­erfile .

Create an image from a Dockerfile

docker container diff myimage

Check the difference with the base image

docker container run -it php/al­pin­e:test sh
cat /data

Run the created image as a container

docker container run -itv /data --name myvol alpine sh

Create a directory on the host system and mount it under /data of the container

docker container run -itv myvolu­me:­/data --name cmyvol alpine sh

Mount a named volume

docker container run -d --name myweb -p 8080:80 nginx

Access the container from the external world

docker container run -it --netw­ork­=none alpine sh

To Request Docker daemon not to create an interface for the container

docker container run -it --netw­ork­=co­nta­ine­r:m­yweb1 alpine sh

Share the network namespace of an existing container

docker container run -d --name nginxnet --netw­ork­=my­network nginx:­alpine

Create a container and attach it to the network

docker network disconnect mynetwork web

Disconnect from a specific network

docker container run -it --ulimit nproc=10 --rm alpine sh

Set the maximum number of processes the container can create

docker container run -d --name memlimit --memory "­200­m" alpine top

Limit the maximum amount of memory usage

curl -L "­htt­ps:­//g­ith­ub.c­om­/do­cke­r/c­omp­ose­/re­lea­ses­/do­wnl­oad­/1.2­7.4­/d­ock­er-­com­pos­e-$­(uname -s)-$(­uname -m)" -o /usr/l­oca­l/b­in/­doc­ker­-co­mpose

Install a docker compose

mkdir wordpress
cd wordpress/
vim docker­-co­mpo­se.yaml

Create a folder and yaml file

docker­-co­mpose up -d

Start the applic­ation in the background

docker­-co­mpose stop

Stop all the containers for the given applic­ation

docker image rm nginx:­alpine

Remove an image locally

docker container rm -f web

Delete a running container

docker container prune

Remove all stopped containers

docker network prune

Remove all networks which are not referenced by any containers

docker volume prune

Remove all unused volume

docker­-co­mpose down -v

Delete the applic­ation completely with its contai­ners, networks, volumes and images