How to exit the container with docker command

Docker is a popular containerization technology that can significantly improve the deployment efficiency and portability of applications. In Docker, a container is a lightweight, portable environment with a file system, network, and process space independent of the host system. Docker commands are the main way to manage and operate Docker containers. It allows users to control and manage Docker containers more conveniently. In actual use, exiting a Docker container is a very common operation. In this article, we will explain how to exit a container using Docker commands.

There are two ways to exit a container in Docker: manual exit and automatic exit.

Manually exiting the container

Manually exiting the container is a way for the user to actively exit the container. It is generally used when the user needs to exit the container after performing certain operations in the container. Let's take a look at common operations to manually exit a Docker container.

Use the exit command to exit the container

Using the exit command within the container is a common way to exit the container, which can be achieved through the following steps:

1. Open the terminal And log in to the container

Enter the Docker command line in the local terminal:

docker exec -it container_name /bin/bash

Among them, container_name is the container to be logged in name. This command will open the container's terminal and allow the user to execute commands within the container.

2. Use the exit command in the container

Execute the exit command in the container to exit the container. The command line is as follows:

$ exit

At this point, the user will exit the container and return to the local terminal.

Use the ctrl d key combination to exit the container

Users can also use the ctrl d key combination to exit the container. After using this key combination within a container, the user will exit the container and return to the local terminal.

Automatically exit the container

Automatically exit the container is a way to automatically exit after executing the specified command in the container. This can be achieved through the following steps:

When the container starts Set the automatic exit command

When starting the container, the user can set the automatic exit command so that the container automatically exits after executing the specified command.

For example, set the following command when starting the container:

docker run -it --rm ubuntu /bin/bash -c "echo 'Hello World'; exit"

Here, the user sets the container to automatically exit after executing echo 'Hello World'. At this time, "Hello World" will be output in the container and then exit automatically.

Use the docker stop command to terminate the container

If the user wants to forcefully exit the Docker container, they can use the docker stop command to terminate the container. This command will stop the Docker container from running and force exit the container.

For example, the user can use the following command to terminate the running in the container:

$ docker stop container_name

Here, container_name is the name of the container to be terminated.

Summary

Exiting a Docker container is one of the common operations in Docker. Manual exit and automatic exit are two commonly used methods. Users can choose the operation method that suits them according to their needs. It should be noted that when exiting the Docker container, make sure that the tasks in the container have been completed and ensure the security of the data.

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