What is Docker?
Docker is a program that makes running and managing containers super easy. It has the potential to change all aspects of server-side applications, from development and testing to deployment and scaling. It’s pretty cool. Recently, I’ve been working through The Docker Book. It’s a top notch book and I highly recommend it, but I’ve had. Sep 03, 2020 Use the docker images command with the -a flag to locate the ID of the images you want to remove. This will show you every image, including intermediate image layers. When you've located the images you want to delete, you can pass their ID or tag to docker rmi: docker images -a. Remove: docker rmi imageone imagetwo Remove dangling images. Docker images consist of multiple layers. The docker images command returns a list of all images on your host. To delete an image pass the ID returned by docker images to docker rmi command. An example of deleting an image is shown below. Sudo docker images sudo docker rmi. Our attempt to remove the helloworld image above failed because there is a running container based on the image. Create.NET Core app. You need a.NET Core app that the Docker container will run. Open your terminal, create a working folder if you haven't already, and enter it. In the working folder, run the following command to create a new project in a subdirectory named app: dotnet new console -o App -n NetCore.Docker.
Docker is an app for building, bugging and testing containerized apps. You can run Docker on a Mac, Windows, or Linux machines. It allows developers to do everything necessary from start to finish to create and ship containerized apps.
If you’ve downloaded it to try it out and have decided not to use it, you may need to uninstall it. Here, we’ll show you how to do it.
Check running processes first
There are several steps needed to uninstall Docker on your Mac. The first is to get rid of the application itself, but before that, check there are no currently running processes.
- Go to Applications > Utilities and launch Activity Monitor.
- Look for any processes in the list that have “Docker” in their name.
- If you find any, select them and press the “Quit Process” button in the Activity Monitor toolbar.
- Quit Activity Monitor.
How to uninstall Docker manually
- In Finder, go to your Applications folder.
- Locate the Docker app.
- Drag it to the Trash and empty it.
That removes Docker, or at least the main application. It doesn’t get rid of all the files that were installed along with it. So, you’ll need to track those down and remove them.
- In Finder, choose the Go menu and select “Go to Folder.”
- In the text box, paste: ~/Library
- Click on the Application Scripts folder and look for “com.docker.helper”
- Drag it to the Trash.
- Now, click on the Caches folder and look for the com.docker.docker folder.
- When you find it, drag it to the Trash.
- Next, find the Containers folder, select it and look for “com.docker.docker” and “com.docker.helper” and drag those to the Trash.
- Check the Application Support folder for any files or folders with Docker in their name. If you find any, drag those to the Trash too.
How to uninstall Docker with CleanMyMac X
Once you’ve removed all those files and trashed the Docker application, it should be completely uninstalled. If all of that seems like a lot of work, there is an easier way. By using a dedicated uninstaller, like the one in CleanMyMac X, you can uninstall multiple apps in a few clicks.
There is something else to bear in mind. If you think you might use Docker again, but have decided to uninstall it because it seems to be causing problems on your Mac, you could try resetting it. That way you won’t have to download Docker for Mac all over again. Resetting an app means removing all of its settings and preferences files so that when you next launch it, it starts up as if it was a brand new copy of the application. You might find that it solves the problem.
The easiest way to reset an app is to use CleanMyMac X. Here’s how to do it:
- Download, install and launch CleanMyMac X (free trial available).
- In the left hand sidebar, in the Applications section, choose Uninstaller.
- When all the applications are listed, locate Docker and check the circle next to it.
- Click on the dropdown menu labelled Uninstall and choose Reset.
- Press the Reset button at the bottom of the window.
- Wait for it to finish and quit CleanMyMac X.
Docker will now have reset and the next time you launch it all its settings and preferences will have returned to their default. So, you’ll need to set it up again from scratch, but any problems it was causing your Mac should be gone.
Uninstalling Docker manually isn’t particularly difficult. But as you can see from the steps above, it’s time consuming and quite fiddly. You need to look in several different folders that are hidden away on your Mac. By far the easiest way to uninstall any app, is to use a dedicated uninstaller like the one in CleanMyMac X. However, before you uninstall it, you should consider resetting Docker, as that may well solve any problems you’ve been having. You can do that using CleanMyMac X too.
A Docker Cheat Sheet
![Docker Docker](/uploads/1/3/4/2/134297516/932372957.jpg)
Introduction
Docker makes it easy to wrap your applications and services in containers so you can run them anywhere. As you work with Docker, however, it’s also easy to accumulate an excessive number of unused images, containers, and data volumes that clutter the output and consume disk space.
Docker gives you all the tools you need to clean up your system from the command line. This cheat sheet-style guide provides a quick reference to commands that are useful for freeing disk space and keeping your system organized by removing unused Docker images, containers, and volumes.
How to Use This Guide:
- This guide is in cheat sheet format with self-contained command-line snippets
- Jump to any section that is relevant to the task you are trying to complete.
The command substitution syntax,
command $(command)
, used in the commands is available in many popular shells such as bash, zsh, and Windows Powershell.Purging All Unused or Dangling Images, Containers, Volumes, and Networks
Docker provides a single command that will clean up any resources — images, containers, volumes, and networks — that are dangling (not associated with a container):
To additionally remove any stopped containers and all unused images (not just dangling images), add the
-a
flag to the command:Removing Docker Images
Remove one or more specific images
Use the
docker images
command with the -a
flag to locate the ID of the images you want to remove. This will show you every image, including intermediate image layers. When you’ve located the images you want to delete, you can pass their ID or tag to docker rmi
:List:
Remove:
Remove dangling images
Docker images consist of multiple layers. Dangling images are layers that have no relationship to any tagged images. They no longer serve a purpose and consume disk space. They can be located by adding the filter flag,
-f
with a value of dangling=true
to the docker images
command. When you’re sure you want to delete them, you can use the docker image prune
command:Note: If you build an image without tagging it, the image will appear on the list of dangling images because it has no association with a tagged image. You can avoid this situation by providing a tag when you build, and you can retroactively tag an images with the docker tag command.
List:
Remove:
Removing images according to a pattern
You can find all the images that match a pattern using a combination of
docker images
and grep
. Once you’re satisfied, you can delete them by using awk
to pass the IDs to docker rmi
. Note that these utilities are not supplied by Docker and are not necessarily available on all systems:List:
Remove:
Remove all images
All the Docker images on a system can be listed by adding
-a
to the docker images
command. Once you’re sure you want to delete them all, you can add the -q
flag to pass the Image ID to docker rmi
:List:
Remove:
Removing Containers
Remove one or more specific containers
Use the
docker ps
command with the -a
flag to locate the name or ID of the containers you want to remove:List:
Remove:
Remove a container upon exit
If you know when you’re creating a container that you won’t want to keep it around once you’re done, you can run
docker run --rm
to automatically delete it when it exits.Run and Remove:
Remove all exited containers
You can locate containers using
docker ps -a
and filter them by their status: created, restarting, running, paused, or exited. To review the list of exited containers, use the -f
flag to filter based on status. When you’ve verified you want to remove those containers, using -q
to pass the IDs to the docker rm
command.List:
Remove:
Remove containers using more than one filter
Docker filters can be combined by repeating the filter flag with an additional value. This results in a list of containers that meet either condition. For example, if you want to delete all containers marked as either Created (a state which can result when you run a container with an invalid command) or Exited, you can use two filters:
List:
Remove:
Remove containers according to a pattern
You can find all the containers that match a pattern using a combination of
docker ps
and grep. When you’re satisfied that you have the list you want to delete, you can use awk
and xargs
to supply the ID to docker rm
. Note that these utilities are not supplied by Docker and not necessarily available on all systems:List:
Remove:
How Delete Docker App On Mac Desktop
Stop and remove all containers
You can review the containers on your system with
docker ps
. Adding the -a
flag will show all containers. When you’re sure you want to delete them, you can add the -q
flag to supply the IDs to the docker stop
and docker rm
commands:List:
Remove:
Removing Volumes
Remove one or more specific volumes - Docker 1.9 and later
Use the
docker volume ls
command to locate the volume name or names you wish to delete. Then you can remove one or more volumes with the docker volume rm
command:List:
Remove:
Remove dangling volumes - Docker 1.9 and later
How Delete Docker App On Mac Computer
Since the point of volumes is to exist independent from containers, when a container is removed, a volume is not automatically removed at the same time. When a volume exists and is no longer connected to any containers, it’s called a dangling volume. To locate them to confirm you want to remove them, you can use the
docker volume ls
command with a filter to limit the results to dangling volumes. When you’re satisfied with the list, you can remove them all with docker volume prune
:Best Docker Apps
List:
Remove:
Remove a container and its volume
If you created an unnamed volume, it can be deleted at the same time as the container with the
-v
flag. Note that this only works with unnamed volumes. When the container is successfully removed, its ID is displayed. Note that no reference is made to the removal of the volume. If it is unnamed, it is silently removed from the system. If it is named, it silently stays present.Remove:
Conclusion
This guide covers some of the common commands used to remove images, containers, and volumes with Docker. There are many other combinations and flags that can be used with each. For a comprehensive guide to what’s available, see the Docker documentation for
docker system prune
, docker rmi
, docker rm
and docker volume rm
. If there are common cleanup tasks you’d like to see in the guide, please ask or make suggestions in the comments.