How to delete the newly installed docker
$ docker ps // 查看所有正在运行容器 $ docker stop containerId // containerId 是容器的ID $ docker ps -a // 查看所有容器 $ docker ps -a -q // 查看所有容器ID $ docker stop $(docker ps -a -q) // stop停止所有容器 $ docker rm $(docker ps -a -q) // remove删除所有容器
1. List the installed docker related software
yum list installed | grep docker
2. Delete docker related software
sudo yum -y remove docker-ce.x86_64
3. Delete image files, containers, etc.
rm -rf /var/lib/docker
4. Delete configuration files, etc.
rm -rf /etc/docker
5. Remove old versions through scripts
sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-selinux \ docker-engine-selinux \ docker-engine
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You can switch to the domestic mirror source. The steps are as follows: 1. Edit the configuration file /etc/docker/daemon.json and add the mirror source address; 2. After saving and exiting, restart the Docker service sudo systemctl restart docker to improve the image download speed and stability.

Steps to create a Docker image: Write a Dockerfile that contains the build instructions. Build the image in the terminal, using the docker build command. Tag the image and assign names and tags using the docker tag command.

How to run Docker commands? Install Docker and start the daemon. Common Docker commands: docker images: display image docker ps: display container docker run: run container docker stop: stop container docker rm: delete container interact with container using Docker command: docker exec: execute command docker attach: attach console docker logs: display log docker commit: commit change to mirror stop Docker daemon: sudo systemctl stop doc

Troubleshooting steps for failed Docker image build: Check Dockerfile syntax and dependency version. Check if the build context contains the required source code and dependencies. View the build log for error details. Use the --target option to build a hierarchical phase to identify failure points. Make sure to use the latest version of Docker engine. Build the image with --t [image-name]:debug mode to debug the problem. Check disk space and make sure it is sufficient. Disable SELinux to prevent interference with the build process. Ask community platforms for help, provide Dockerfiles and build log descriptions for more specific suggestions.

A Data Volume Container is a Docker container that stores and manages persistent data. Using a data volume container includes: 1. Create a data volume container; 2. Mount a data volume; 3. Use a data volume in the container. Advantages: persistence, shared data, backup and recovery; Disadvantages: performance, portability.

Docker LNMP container call steps: Run the container: docker run -d --name lnmp-container -p 80:80 -p 443:443 lnmp-stack to get the container IP: docker inspect lnmp-container | grep IPAddress access website: http://<Container IP>/index.phpSSH access: docker exec -it lnmp-container bash access MySQL: mysql -u roo

You can use a variety of methods provided by Docker to find containers, including: Docker CLI: Use commands such as docker ps to list containers and use filters to narrow down searches. Docker API: Send a request to retrieve container information. Docker Compose: Use commands such as docker-compose ps to list containers. Docker Tools: Use tools such as Docker Explorer or Portainer to manage containers in a graphical interface. Container ID: Use a unique ID to find containers with the Docker CLI, API, or tool.

Resolve Docker startup failure: 1. Run Docker with root user permissions; 2. Check port conflicts and adjust port numbers; 3. Clean unused images and volumes to free up storage space; 4. Increase memory allocated by Docker; 5. Install required dependencies; 6. Check the correctness of volume mounts; 7. View container logs for error information; 8. Update the kernel version to comply with Docker requirements.


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