Docker Tutorial

Here's a basic tutorial on how to use Docker:

• Install Docker: First, you'll need to install Docker on your computer. You can download Docker from the official Docker website.

• Pull an Image: Once Docker is installed, you can start using it by pulling a Docker image from Docker Hub or another Docker registry. To pull an image, use the docker pull command followed by the name of the image:

docker pull image-name

For example, to pull the latest version of the Ubuntu image, you can use the following command:

docker pull ubuntu

• Run a Container: Once you have pulled an image, you can run a container from that image using the docker run command:

docker run [OPTIONS] image-name [COMMAND] [ARG...]

Here, OPTIONS are any additional options you want to use, image-name is the name of the image you want to run, COMMAND is the command you want to run inside the container (optional), and ARG are any additional arguments to pass to the command (optional).

For example, to run a container from the Ubuntu image and start an interactive shell inside the container, you can use the following command:

docker run -it ubuntu /bin/bash

This will start a new container from the Ubuntu image and start an interactive shell inside the container.

• Build a Docker Image: If you want to create a custom Docker image, you can use a Dockerfile to define the configuration of the image. To build a Docker image from a Dockerfile, use the docker build command:

docker build [OPTIONS] PATH

Here, OPTIONS are any additional options you want to use, and PATH is the path to the directory containing the Dockerfile.

For example, to build a Docker image from a Dockerfile located in the current directory, you can use the following command:

docker build -t myimage .

This will build a new Docker image with the tag myimage using the Dockerfile in the current directory.

• Push a Docker Image: Once you have created a Docker image, you can push it to a Docker registry using the docker push command:

docker push image-name

Here, image-name is the name of the image you want to push.

For example, to push the myimage image to Docker Hub, you can use the following command:

docker push myusername/myimage

This will push the myimage image to Docker Hub with the name myusername/myimage.

Overall, Docker is a powerful tool for building, running, and managing containerized applications. By following these basic steps, you can start using Docker to deploy and manage your own applications.