![]() Your image is the box that contains everything that is needed to run the operating system and other dependencies. Images act as a template and turn into a container once runĪll docker usage begins with an Image. sudo groupadd docker sudo usermod -aG docker $USER Images & Containers If you are using Linux, you will also want to add your user to the docker group, which allows you to run docker without sudo. This will download the docker cryptographic key and add it as a trusted source. If you are using Linux, don’t forget to run curl -fsSL | sudo gpg -dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg Need I Say docker is coded in Go? Installing Dockerĭownload and Install Docker Engine by visiting their download website.ĭocker-desktop is now available for all platforms and can act as a very nice gateway into learning and maintaining your docker engine. If you are looking for a more in-depth explanation of how it works, I recommend reading the official docker docs for the details. And when I say everything, I mean everything, the operating system, dependencies, networking, configurations. Imagine that you install PostgreSQL on a Ubuntu machine and configure it to work, it takes time, but with docker, you can containerize that installation and operating system, and the next time you need it, simply start it up.ĭocker images are not Virtual Machines, but rather self-contained units of software, and that self-contained unit contains everything that it needs to be running. This containerized software is possible to be run by anyone who possesses it. This is possible by containerizing software, a set of software that has everything needed to run. ![]() Video recording of this article What is Dockerĭocker is used for building shippable images that can be shipped and executed on any system that has docker installed.
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