How to delete all Docker containers

Docker is currently the most popular containerization technology, and its emergence has greatly simplified the deployment and management of applications. However, in the process of using Docker, we will create many containers. If these containers are no longer used, they should be deleted in time, otherwise they will occupy precious resources. This article will describe how to delete all containers in Docker at once on a Linux system.

1. Use docker ps command to list all containers

First, we need to use docker ps command to list all running Docker containers in the current system. Enter the following command in a Linux terminal:

docker ps -a

This command will list all containers, whether they are running or not. The output should include information such as the container's ID, name, image, creation time and status.

2. Use docker rm command to delete all containers

After we have the container list, we can use docker rm command to delete all containers. Enter the following command in a Linux terminal:

docker rm -f $(docker ps -aq)

This command will forcefully delete all containers, including running ones. Among them, the command docker ps -aq inside $() will return the IDs of all containers. We can use these IDs to delete all containers.

3. Verify that the container has been completely deleted

Finally, we need to verify that the container has been completely deleted. You can use the docker ps -a command again to view the container list. If the output is empty, it means that all containers have been successfully deleted.

Summary

In this article, we introduced how to delete all containers in Docker at once on a Linux system. Although we strongly recommend users to use Docker technology, they also need to use it with caution and avoid unnecessary waste of resources, otherwise it will lead to port exhaustion, performance degradation and other problems. Therefore, users are advised to promptly delete Docker containers when they are no longer in use to ensure optimal performance and availability of the system.

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