How to enter docker environment

Docker is a containerization technology that facilitates developers to deploy and manage applications. The Docker environment is an application on the operating system. The Docker environment can be entered through the command line or graphical interface. This article will introduce how to enter the Docker environment, as well as common commands and operations in the Docker environment.

1. How to enter the Docker environment

1. Command line method

Enter the following instructions on the command line to enter the Docker container environment:

docker exec -it container_name /bin/bash

Among them, container_name is the name of the Docker container. Through this command, you can enter the shell of the container environment and perform operations.

2. Graphical user interface mode

You can enter the Docker environment by running the Docker Desktop application, so that you can manage, deploy and other operations on the Docker environment. Docker Desktop provides a user-friendly interface for developers to use.

2. Common commands in the Docker environment

After entering the Docker environment, you can use some common Docker commands to operate the container.

1. docker ps

This command is used to list all running Docker containers.

docker ps

2. docker images

This command is used to list all Docker images.

docker images

3. docker build

This command is used to build a Docker image.

docker build -t image_name .

Among them, image_name is the name of the built Docker image.

4. docker run

This command is used to create and run a Docker container from a Docker image.

docker run -it image_name /bin/bash

5. docker exec

This command is used to execute commands in a running Docker container.

docker exec -it container_name /bin/bash

Among them, container_name is the name of the Docker container.

6. docker stop

This command is used to stop a running Docker container.

docker stop container_name

Among them, container_name is the name of the Docker container.

7. docker rm

This command is used to delete a stopped Docker container.

docker rm container_name

Among them, container_name is the name of the Docker container.

8. docker rmi

This command is used to delete the Docker image.

docker rmi image_name

Among them, image_name is the name of the Docker image.

3. Operations in Docker environment

1. Pull images from Docker warehouse

Docker Hub is an open Docker image warehouse for users to store , share and run Docker images. You can use the following command to pull the image from Docker Hub:

docker pull image_name

where image_name is the name of the image to be pulled.

2. Create a Docker image

Before using Docker, you need to create your own Docker image. You can define your own Docker image in the Dockerfile, and then use the following command to build it:

docker build -t image_name .

where image_name is the name of the image, and the file path during the build process is ..

3. Run Docker container

Before creating a Docker container, you need to create a Docker image. You can create and run a Docker container from a Docker image using the following command:

docker run -it image_name /bin/bash

where image_name is the name of the Docker image.

4. Copy files to Docker container

You can use the following command to copy files to a running Docker container:

docker cp file.txt container_name:/path/to/file.txt

Where, file.txt is the file to be copied, container_name is the name of the Docker container, and /path/to is the target path.

5. Copy files from a Docker container

You can use the following command to copy files from a running Docker container:

docker cp container_name:/path/to/file.txt file.txt

Where, container_name is Docker The name of the container, /path/to is the source file path, and file.txt is the target file path.

Summary

This article introduces how to enter the Docker environment, as well as common commands and operations in the Docker environment. By understanding and mastering these operations, you can more easily use Docker to develop and deploy applications.

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