Basic Commands

• info: Display system information
• version: Display system version
• login: Log in to a Docker registry
  • -u <username>
  • -p <password>
• push <registry username>/<image name>:<tag>: Push an image to a registry
• pull [image Name]: Pull an image from a registry
• run [image Name]: Run a container
  • -d: Detached mode
  • -p: host_port:container_port image_name
• start [container Name]: Start stopped containers
• ps: List running containers
  • -a: List all containers (running and stopped)
• stop [container Name]: Stop a container
• kill [container Name]: Kill a container
• image inspect [image name]: Get image info
• rm [container name]: Remove a stopped container
• rm $(docker ps -a -q): Remove all stopped containers
• rmi [Image Name]: Delete an image
• system prune -a: Remove all images not in use by any containers
• container exec -it [container name] --bash: Attach a bash shell to a running container
• images: List all images pulled
• build: Build an image using a Dockerfile
  • -t [name:tag]
  • -f [file name]: Specify Dockerfile location
• tag [image name] [name:tag]: Tag an existing image
• create volume [volume name]: Create a new volume

Volume Management

• volume
  • ls: List volumes
  • inspect [volume name]: Display volume info
  • rm [volume name]: Delete a volume
  • prune: Delete all unused volumes

Example Dockerfile

# Use an official Node.js runtime as the base image
FROM node:14

# Set the working directory in the container
WORKDIR /app

# Copy package.json and package-lock.json
COPY package*.json ./

# Install dependencies
RUN npm install

# Copy the rest of the application code
COPY . .

# Expose port 8080
EXPOSE 8080

# Specify the user to run the container as
USER node

# Define the command to run the application
CMD ["npm", "start"]