manage docker images

manage docker images

manage docker images

Once you have installed docker its time to manage , pull , remove docker images.

What is an Image

Image is a file that comprise of multiple layers used to execute code in a docker. It is built from the instruction for a complete and executable version of an application.

Note it does rely on the OS kernel

There are more then 1500 images created by different application teams such as by apache , ngnix , mysql , mariadb , these are called official docker images. One of the biggest repositories for these official docker images is

https://hub.docker.com

.

Installing Images

Downloading and installing an image on docker in Linux is a very straight forward way with a single command,example ngnix

docker pull <package_name>

To pull a particular version of an image

docker pull <package_name>:package_version_detail

by default pull will grab the latest version of the package and same goes for removing the version with docker rmi <package_name>

To see all the images that are downloaded on your machine use the command

docker images 

To delete an image you can type

docker rmi <package_name>:package_version_details

if no package version details are added it will delete the latest version of the package.

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