How to delete docker image
Docker is one of the most popular containerization technologies currently. As a lightweight, portable and self-contained container application environment, Docker makes application development, testing and deployment easier and more efficient. In Docker, image is a very important concept, which is the basis of Docker container applications. This article will introduce how to delete Docker image.
- View existing Docker images
Before deleting the Docker image, we need to first understand what images we already have. All Docker images in the current system can be listed through the command docker images
. After executing this command, the relevant information of the image will be listed, such as REPOSITORY, TAG, IMAGE ID, CREATED, etc. Among them, REPOSITORY indicates which warehouse this Docker image belongs to, and TAG indicates the version of this Docker image.
- Delete a single Docker image
Deleting a single Docker image is very simple, just use the docker rmi command. The command format is as follows:
docker rmi [OPTIONS] IMAGE [IMAGE...]
Among them, IMAGE represents the ID or name of the Docker image to be deleted, and OPTIONS represents the deletion options. If OPTIONS is not specified, the default options will be used.
For example, assuming we want to delete the Docker image whose REPOSITORY is nginx and TAG is latest, we can execute the following command:
docker rmi nginx:latest
After executing this command, the system will delete the Docker image.
- Delete Docker images in batches
When we need to delete multiple Docker images, we can use the batch deletion option of the docker rmi command. The command format is as follows:
docker rmi [OPTIONS] $(docker images -q IMAGE [IMAGE...])
Among them, IMAGE represents the ID or name of the Docker image to be deleted, and OPTIONS represents the deletion options. $(docker images -q IMAGE [IMAGE...])
means passing IMAGE as a parameter to the docker images command, returning a list of image IDs, and then passing this list as a parameter to the docker rmi command.
For example, assuming we want to delete the Docker image whose REPOSITORY is redis and TAG is 5.0.5 and 5.0.6, we can execute the following command:
docker rmi $(docker images -q redis:5.0.5 redis:5.0.6)
After executing this command, the system will delete it The specified Docker image.
- Delete unused Docker images
In the process of using Docker, we may leave some unused Docker images, which may have been built or downloaded before , but was not called in subsequent uses. These unused Docker images will occupy the system's storage space and affect system performance. Therefore, we need to delete these unused Docker images.
The docker system prune command can be used to clear unused Docker images, containers, volumes, and networks. Among them, the --all option can clear all unused Docker images. The command format is as follows:
docker system prune [OPTIONS]
For example, we can use the following command to clear all unused Docker images:
docker system prune --all
After executing this command, the system will clear all unused Docker images.
Summary
This article introduces how to delete Docker images, including deleting a single Docker image, deleting Docker images in batches, and deleting unused Docker images. By learning these methods, we can help us better manage Docker container applications and improve application performance and reliability.
The above is the detailed content of How to delete docker image. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



Docker is a must-have skill for DevOps engineers. 1.Docker is an open source containerized platform that achieves isolation and portability by packaging applications and their dependencies into containers. 2. Docker works with namespaces, control groups and federated file systems. 3. Basic usage includes creating, running and managing containers. 4. Advanced usage includes using DockerCompose to manage multi-container applications. 5. Common errors include container failure, port mapping problems, and data persistence problems. Debugging skills include viewing logs, entering containers, and viewing detailed information. 6. Performance optimization and best practices include image optimization, resource constraints, network optimization and best practices for using Dockerfile.

DockerVolumes ensures that data remains safe when containers are restarted, deleted, or migrated. 1. Create Volume: dockervolumecreatemydata. 2. Run the container and mount Volume: dockerrun-it-vmydata:/app/dataubuntubash. 3. Advanced usage includes data sharing and backup.

Docker security enhancement methods include: 1. Use the --cap-drop parameter to limit Linux capabilities, 2. Create read-only containers, 3. Set SELinux tags. These strategies protect containers by reducing vulnerability exposure and limiting attacker capabilities.

The steps to update a Docker image are as follows: Pull the latest image tag New image Delete the old image for a specific tag (optional) Restart the container (if needed)

Four ways to exit Docker container: Use Ctrl D in the container terminal Enter exit command in the container terminal Use docker stop <container_name> Command Use docker kill <container_name> command in the host terminal (force exit)

How to restart the Docker container: get the container ID (docker ps); stop the container (docker stop <container_id>); start the container (docker start <container_id>); verify that the restart is successful (docker ps). Other methods: Docker Compose (docker-compose restart) or Docker API (see Docker documentation).

Methods for copying files to external hosts in Docker: Use the docker cp command: Execute docker cp [Options] <Container Path> <Host Path>. Using data volumes: Create a directory on the host, and use the -v parameter to mount the directory into the container when creating the container to achieve bidirectional file synchronization.

How to use Docker Desktop? Docker Desktop is a tool for running Docker containers on local machines. The steps to use include: 1. Install Docker Desktop; 2. Start Docker Desktop; 3. Create Docker image (using Dockerfile); 4. Build Docker image (using docker build); 5. Run Docker container (using docker run).
