Verify that Docker Engine is installed correctly by running the hello-world image. Upgrade Docker Engine To upgrade Docker Engine, first run sudo apt-get update , then follow theinstallation instructions, choosing the newversion you want to install.
The Docker daemon starts automatically. Upgrade Docker Engine To upgrade Docker Engine, download the newer package file and repeat theinstallation procedure, pointing to the new file. Install using the convenience script Docker provides convenience scripts at get. Using these scripts is not recommended for productionenvironments , and you should understand the potential risks before you usethem: The scripts require root or sudo privileges to run. Therefore,you should carefully examine and audit the scripts before running them.
The scripts attempt to detect your Linux distribution and version andconfigure your package management system for you. In addition, the scripts donot allow you to customize any installation parameters. The scripts install all dependencies and recommendations of the packagemanager without asking for confirmation. This may install a large number ofpackages, depending on the current configuration of your host machine. Do not use the convenience script if Docker has already been installed on thehost machine using another mechanism.
Warning : Always examine scripts downloaded from the internet beforerunning them locally. Note : To install Docker without root privileges, seeRun the Docker daemon as a non-root user Rootless mode. Upgrade Docker after using the convenience script If you installed Docker using the convenience script, you should upgrade Dockerusing your package manager directly. Uninstall Docker Engine Uninstall the Docker Engine, CLI, and Containerd packages: Images, containers, volumes, or customized configuration files on your hostare not automatically removed.
To delete all images, containers, andvolumes: Ubuntu You must delete any edited configuration files manually. Next steps Ubuntu Review the topics in Develop with Docker to learn how to build new applications using Docker.
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