• virtual file system
• port binded: talk to application running inside of container
• application image: postgres, redis mongo, nginx, python (etc)

1. how to search a docker image in hub.docker.com from CLI

• docker search httpd

2. Download a docker image from hub.docker.com

• docker image pull <image_name>:<image_version/tag>

3. List out docker images from your local system

• docker images or
• docker image ls

4. Create/run/start a docker container from image

• docker run -d --name <container_Name> <image_name>:<image_version/tag>

• d - run your container in back ground (detached)

5. Expose your application to host server

• docker run -d -p <host_port>:<container_port> --name <container_Name> <image_name>:<Image_version/tag>

• docker run -d -p 8080:80 -p 3000:80 --name starwars httpd:2.3

if the above command isn't working use the following

• docker run -d --restart unless-stopped -p <host_port>:<container_port> --name <container_Name> <image_name>:<Image_version/tag>

• EXAMPLE: docker run -d --name httpd_server -p 8080:80 httpd:2.2

6. List out running containers

• docker ps

7. List out all docker container (running, stpooed, terminated, etc...)

• docker ps -a

8. run a OS based container which interactive mode (nothing but login to container after it is up and running)

• docker run -i -t --name centos_server centos:latest
• i - interactive
• t - Terminal

9. Stop a container

• docker stop <container_id>

10. Start a container which is in stopped or exit state

• docker start <container_id>

11. Remove a container (Can not remove a running container)

• docker rm <container_id>

12. login to a docker container

• docker exec -it <container_Name> /bin/bash

13. Pull only Container Ids

• docker ps -aq

14. Delete multiple containers

• docker rm $(docker ps -aq)
• docker rmi $(docker images -aq)

15. Format Container

• docker ps --format="ID\t{{.ID}}\nNAME\t{{.Names}}\nIMAGE\t{{.Image}}\nPORTS\t{{.Ports}}\nCOMMAND\t{{.Command}}\nCREATED\t{{.CreatedAt}}\nSTATUS\t{{.Status}}\n"

16. Run Dockerfile to create image (Dockerfile - Contains a series of steps that define how your image is build.)

• docker build . -t httpd:latest
• "t" tag

17. Docker run

• docker run -p 8080:8080 httpd:latest

18. Docker Volumes (allow sharing of data between files, folders & containers)

• (example to share files between local and container run) docker run -d --name website -v $(pwd):/usr/share/nginx/html:ro -p 8080:80 nginx:latest

• "ro" read only. If we want to write then we need to remove "ro"

• (example to share files between containers)
• docker run -d --name website-copy --volumes-from website -p 8081:80 nginx

19. Docker compose up & down commands

• docker-compose -f docker-compose.yaml up -d
• docker-compose -f docker-compose.yaml down

20. Docker network

• docker network ls
• docker network create <network_name>