How to delete docker image

Docker is an open platform for developing, running and deploying applications. It can easily package applications and dependent libraries into a container, reducing the burden on system administrators and speeding up application development. deliver. In Docker, the image is an important part of building a container. It defines the file system and applications in the container. Therefore, when using Docker, we need to manage and use the image correctly. This article will introduce how to delete the Docker image.

1. View images

Before performing any deletion operation, you first need to view the images in the system to ensure that the required images are not deleted by mistake. You can use the following command to list all images on the system:

docker images

This command will list all images that have been downloaded to the local system, including image name, version number, image ID, creation time, size and other information .

2. Delete image

The command format to delete an image is:

docker rmi [OPTIONS] IMAGE [IMAGE...]

Among them, OPTIONS is optional and IMAGE is the name or ID of the image to be deleted. , multiple images can be deleted at the same time.

For example, if you want to delete the image with the name "nginx", you can execute the following command:

docker rmi nginx

If you want to delete the image with the ID "c3f279d17e0a", you can execute the following command:

docker rmi c3f279d17e0a

If you want to delete multiple mirrors, you can specify multiple mirror names or IDs in the command, for example:

docker rmi nginx mysql redis

3. Forced deletion of mirrors

Sometimes, Docker will be unable to delete an image for some reason. In this case, you can add the "-f" option to force the image to be deleted. The command format is as follows:

docker rmi -f [IMAGE...]

Among them, IMAGE represents the name or ID of the image to be deleted, and multiple images can be deleted at the same time.

For example, if you want to forcibly delete the image with the name "nginx", you can execute the following command:

docker rmi -f nginx

If you want to forcibly delete the image with the ID "c3f279d17e0a", you can execute the following command:

docker rmi -f c3f279d17e0a

If you want to forcefully delete multiple mirrors, you can specify multiple mirror names or IDs in the command, for example:

docker rmi -f nginx mysql redis

4. Delete all mirrors

If you need to delete all images on the system, you can use the following command:

docker rmi $(docker images -q)

This command will first use the "docker images -q" command to query all images on the system, and use "$(docker images -q) "Pass the query results as parameters to the "docker rmi" command to delete all images.

It should be noted that this command will delete all images, including images in use, so you need to consider carefully before executing the command.

Summary

When using Docker, managing and using images reasonably is an important consideration. Properly deleting images that are no longer needed is an important step in keeping your system tidy and reducing storage space. This article describes how to view the image on the Docker system, as well as how to delete the image and force the deletion of the image. It should be noted that before deleting an image, make sure that the image is no longer needed to avoid accidentally deleting an image that is necessary for the system.

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