Thanks for reading this article. centos_test: Name of the container from which you are creating the image. Ther are a lot of pre-built images out there on the docker hub. Freelancer & Linux System Administrator.

After the above command is run, you would see the new image “centos_image” in the list of docker images available locally on the system. We need an image to start the container. To create Docker containers of different Linux distributions or apps, you have to use different Docker images. Once you create a container using a specific Docker image, the image is downloaded and stored locally on your Docker host. The easiest way to list Docker images is to use the “docker images” with no arguments. 5. Docker images are used to define instructions to be executed on your containers.On Docker images, you may choose to have a specific operating system, to install specific packages or to execute a set of predefined commands.However, if you create multiple environments or multiple tools, As a consequence, you may need commands in order to When using this command, you will be presented with the complete Alternatively, you can use the “docker image” command with the “ls” argument.Note that you will have to make sure that you have written “image” and not “images”.To achieve that, you would run the following commandWith the “–filter” option, you can specify the following keys :As a short example, let’s say that you want to filter If we want to isolate all the images starting with “Deb”, we would run the following command.Similarly, if you are working with multiple images of the same repository, you can add an additional tag separated by a colon character.In short, you would have the following output when listing your imagesThose images or layers are not actively used anymore : they have been “re-tagged”.If you want to filter images that are defined as “dangling”, you can append the “dangling=true” option.In our case, the “Debian Jessie” image was the most recent one : to list images created before, we would run the following command.Similarly, you can choose to list Docker images created after another image, you would use the “since” keyword instead of the “before” keyword.In our previous chapters, we got the same output when running our commands.Docker will by default display the results in a set of five different columns : repository, tag, image ID, the creation date and the size of your image.However, in some cases, you may want to have a different output if you need to process the information in a specific system for example.In short, a Go template is a set of variables that are enclosed in double curly braces, representing the different columns to be displayed.For example, if you want to have the output as the repository named followed by the image ID, you would run the following command.Here is a list of the different placeholders that you can use in order to format your docker images.As you can see, you are only presented with the list of image ID available in your current Docker environment, awesome!You also learnt that it is possible for you to append options in order to have a more detailed output.You can use filters to have specific columns or to isolate dangling images for example.Also, if you are interested in Docker or DevOps, we have a complete section dedicated to it on the website, so make sure to check it out!Copyright © 2019 - devconnected.

But if you prefer the long image ID, you can use the To list the locally stored Docker images along with the long image ID, run the following command:As you can see, the long sha256 format of the image ID is displayed.Docker intermediary images has the repository and tag name To list all the unused Docker images on your Docker host, run the following command:As you can see, all the unused Docker images along with their image ID, creation date, size are listed.At times, you may only need a list of image IDs of the locally stored Docker images on your Docker host. The Docker images on the system can be removed via the docker rmi command. There, you can find different files that represent read-only layers of a Docker image and a layer on top of it that contains your changes.

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