Summarize the methods of starting containers in Docker

Docker is a very popular containerization technology that allows you to easily deploy applications in different environments. Docker containers are lightweight objects hosted by Docker that can run applications within them, while Docker images are templates used to create containers.

In this article, we will explore how to start a container in Docker. First, make sure you have Docker installed.

Installing Docker

Docker installation is very easy. You can download and install Docker suitable for your operating system through the official website. After completing the installation, you can enter the following command in the terminal to verify whether Docker is installed successfully:

docker version

If the installation is successful, you should be able to see the Docker version information.

Pull the Docker image

Before starting the container, we need to pull a Docker image. You can find many public Docker images from Docker Hub, or you can build your own Docker images. Suppose we want to pull a Docker image named ubuntu, we can enter the following command in the terminal:

docker pull ubuntu

Start the Docker container

After the Docker image is downloaded to the local, we can This image creates a Docker container. Before starting the container, we can use the following command to list all local Docker images:

docker images

You can see all the Docker images that have been pulled.

Next, we can create a Docker container using the following command:

docker run -it ubuntu /bin/bash

This command will start a terminal session in a new container and connect you to the container. In this example, we are using the Ubuntu image and launching a bash terminal inside the container. The output should be similar to:

root@40e84bc98c81:/#

where 40e84bc98c81 is the ID of the container.

In a terminal session, you can use the command line just like in a normal Linux environment. You can install packages, modify files, etc. in the container.

Stop the Docker container

When you have finished working in the Docker container, you can use the following command to stop the container and exit the terminal session:

exit

The container will automatically stop .

If you need to stop the container manually, you can run the following command in another terminal:

docker stop <容器ID>

Replace with the ID of the container.

Conclusion

In this article, we introduced how to start a container in Docker, including how to pull a Docker image, how to create a Docker container, how to enter the container and use the command line, and How to stop a container. Docker is a powerful container platform that can help you easily deploy applications. If you haven't used Docker yet, go and try it!

The above is the detailed content of Summarize the methods of starting containers in Docker. For more information, please follow other related articles on the PHP Chinese website!