Docker 🛳

Installation :

https://docs.docker.com/engine/install/ubuntu/

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

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1. Running a Container

• Basic Run Command:

  docker run <options> <image>

• Example: Run a container in detached mode with port mapping:

  docker run -d -p 443:443 --name <name> <docker_image_name>

  • -d: Run container in detached mode.

  • -p 443:443: Map port 443 on the host to port 443 on the container.

2. List Running Containers

• Command:

  docker ps

  • Lists all running containers.

3. List All Containers (Including Stopped)

• Command:

  docker ps -a

4. Stopping a Container

• Command:

  docker stop <container_name_or_id>

  • Stops a running container.

• Example:

  docker stop python

5. Starting a Container

• Command:

  docker start <container_name_or_id>

6. Remove a Container

• Command:

  docker rm <container_name_or_id>

7. Remove a Running Container (Force)

• Command:

  docker rm -f <container_name_or_id>

8. Viewing Container Logs

• Command:

  docker logs <container_name_or_id>

9. Run a Container with a Specific Command

• Example: Running a container with a custom command:

  docker run -d --name mycontainer ubuntu sleep 3600

  • This runs the Ubuntu image and starts the container with the command sleep 3600 (for 1 hour).

10. Building a Docker Image

• Command:

  docker build -t <image_name> <path_to_dockerfile>

• Example:

  docker build -t my_image .

11. List All Docker Images

• Command:

  docker images

12. Remove a Docker Image

• Command:

  docker rmi <image_name_or_id>

13. Viewing Docker Info

• Command:

  docker info

  • Displays information about your Docker installation and environment.

14. Accessing a Running Container (Interactive Mode)

• Command:

  docker exec -it <container_name_or_id> /bin/bash

  • Starts an interactive bash session inside the container.

15. Viewing Docker Version

• Command:

  docker --version

16. Remove Unused Docker Resources (Images, Containers, Volumes)

• Command:

  docker system prune

17. Building and Running a Docker Compose Application

• Command:

  docker-compose up

  • Starts the services defined in docker-compose.yml.

18. Stopping All Containers

• Command:

  docker stop $(docker ps -q)

19. Accessing a Container's File System

• Command:

  docker cp <container_name_or_id>:<container_path> <host_path>

20. Viewing Docker Container Statistics

• Command:

  docker stats

  • Displays real-time statistics about containers' CPU and memory usage.