In this quick guide, we’ll discuss the Docker command to remove one or more images and we will also demonstrate its use with a practical Spring Boot application example.
Check out all Docker tutorials and guides: Docker Tutorials and Guides
Basic Syntax
To remove Docker images, the primary command you'll be using is docker rmi.
Syntax:
docker rmi [OPTIONS] IMAGE [IMAGE...]Practical Examples
Pulling a Spring Boot Image:
Let's begin by pulling a sample Spring Boot application image from Docker Hub:docker pull springio/gs-spring-boot-dockerListing Images:
To see the list of images:
docker imagesFrom this list, identify the IMAGE ID or name of the image you intend to remove.
Removing a Single Image by ID:
Once you have the IMAGE ID, use the docker rmi command:docker rmi <IMAGE_ID>For instance, if your IMAGE ID is abcdef1234, you would run:
docker rmi abcdef1234Removing a Single Image by Name:
Alternatively, you can also remove an image by its name:
docker rmi springio/gs-spring-boot-dockerRemoving Multiple Images:
To delete multiple images at once, list their IMAGE IDs or names separated by spaces:
docker rmi <IMAGE_ID1> <IMAGE_ID2> <IMAGE_NAME1>Force Removing an Image:
Sometimes, an image might be in use by a stopped container. If you're sure about removing the image, you can force its removal:
docker rmi -f <IMAGE_ID_or_NAME>Automated Cleanup:
If you're looking to clean up multiple unused images, you might want to consider:
docker image pruneThis command will remove all dangling images (images without a tag). If you wish to remove all unused images (not just the dangling ones), you can use:
docker image prune -aConclusion
Regularly cleaning up unused Docker images helps in maintaining a clean disk space and ensures smoother operations. Remember always to be cautious and double-check the images you're about to delete, especially in production environments. With docker rmi in your toolbox, you're now equipped to manage your Docker images effectively. Safe cleaning!
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