🐳 Docker Basic Commands Cheat Sheet

This is my personal reference for essential Docker commands while learning containerization.

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📦 Basic Container Commands

Action	Command
Check Docker version	docker --version
Check system info	docker info
List running containers	docker ps
List all containers (stopped)	docker ps -a
List all images	docker images
Pull an image from Docker Hub	docker pull ubuntu
Run a container (interactive)	docker run -it ubuntu bash
Run container (detached)	docker run -d ubuntu sleep 1000
Stop a running container	docker stop <container_id>
Remove a container	docker rm <container_id>
Remove an image	docker rmi <image_id>
View container logs	docker logs <container_id>
Execute command inside container	docker exec -it <container_id> bash

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Port Mapping

docker run -it -p 3000:3000 <image_name>

Docker Node app build Commands [ build an Image for Local machine Not public]

node App is in the /docker-app file

docker build -t <image_name> . docker build -t fisrt-mynode .

main.js file

      const express = require('express');
const app = express();

const PORT = process.env.PORT || 8000;

app.get('/', (req, res) => {
    return res.json({ message: "Hello Node from container v2" });
});

app.listen(PORT, () => console.log(`Server is running on port ${PORT}`));

Dockerfile

FROM ubuntu

RUN apt-get update
RUN apt-get install -y curl
RUN curl -sL https://deb.nodesource.com/setup_18.x | bash -
RUN apt-get upgrade -y
RUN apt-get install -y nodejs

COPY package.json package.json
COPY package-lock.json package-lock.json
COPY main.js main.js

RUN npm install

ENTRYPOINT ["node", "main.js"]
   

Port Mapping [ with change in .env variables ]

docker run -it -e PORT=4000 -p 3000:3000 < image_name>

1] first create a public repository on [hub.docker.com]

2] Docker Public image upload on [hub.docker.com]

docker build -t ismaildcode/first-dockerapp .

3] You can pull Image Using this command

docker pull ismaildcode/first-dockerapp:latest

simple Node app for understand how to create public image

Simply runing on PORT localhost:4000