🐳 What is Docker?
Docker is a powerful platform for automating the deployment of applications within lightweight, portable containers, making it easier to manage and scale applications.
🔧 Basic Commands
| Command | Description |
|---|---|
docker --version |
Check the installed Docker version |
docker pull <image> |
Download an image from Docker Hub |
docker images |
List all downloaded images |
docker rmi <image> |
Remove an image |
docker run <image> |
Create and start a container from an image |
docker ps |
List all running containers |
docker ps -a |
List all containers (running + stopped) |
docker stop <container> |
Stop a running container |
docker start <container> |
Start a stopped container |
docker rm <container> |
Remove a stopped container |
📦 Working with Containers
| Command | Description |
|---|---|
docker exec -it <container> /bin/bash |
Access the terminal of a running container |
docker logs <container> |
View logs from a container |
docker commit <container> <new_image> |
Create a new image from a container's changes |
docker network ls |
List all networks |
docker volume ls |
List all volumes |
🛠️ Dockerfile Basics
- Dockerfile Structure:
# Base image
FROM ubuntu:latest
# Maintainer
LABEL maintainer="your_name@example.com"
# Install dependencies
RUN apt-get update && apt-get install -y python3
# Copy files
COPY . /app
# Set working directory
WORKDIR /app
# Command to run
CMD ["python3", "app.py"]
🌐 Docker Compose
- docker-compose.yml Example:
version: '3'
services:
web:
image: nginx:latest
ports:
- "80:80"
db:
image: mysql:latest
environment:
MYSQL_ROOT_PASSWORD: example
🔥 Common Commands
| Command | Description |
|---|---|
docker-compose up |
Start services defined in docker-compose.yml
|
docker-compose down |
Stop and remove containers |
docker-compose logs |
View logs for services |
📘 Useful Tips
-
Container Management:
- Use the
-dflag withdocker runto run containers in detached mode for background execution.
- Use the
-
Clean Up:
- Run
docker system pruneto remove unused data and free up disk space.
- Run
-
Help:
- Use
docker <command> --helpfor detailed command information and options.
- Use
🎨 Styling Tips
- Terminal Color: Use terminal color codes for output to make commands visually appealing:
echo -e "\033[1;32mYour command here\033[0m"
- Icons: Enhance your notes with emojis for a more engaging experience.
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