This tutorial will demonstrate how you can set up and use Docker on CentOS 7 in a few simple steps.Īll the commands you execute throughout this tutorial are run as a non-root user and if necessary root access will be provided using the sudo keyword. The most popular and easy way to install Docker on the existing operating system is by using yum commands. There are various ways to install Docker on Linux distributions. Containers are very similar to virtual machines, but they are more portable, efficient, and easy to use.

It provides a way to separate your applications from your infrastructure. That’s fine for many cases, but next I will attempt to figure out how specify via a Dockerfile that man is installed.Docker is a platform that makes running and managing application processes in containers easier. I can’t (that I know of) inspect the container and know whether or not man is installed without running it. Progress! Now we have a CentOS container where man is already installed. Quite the improvement! Now we need to save our /]# exit For example, this doesn’t even have man /]# man manīash: man: command not /]# yum install /]# man man What if I want to modify the container? Right now it is pretty bare-bones.

Instead we can tell it to run interactively and with a terminal by specifying a couple options: That makes sense, because we’re not telling the containerized OS to do anything - it starts, it doesn’t have anything to do, and so it shuts down immediately. What did it do? How do I access it?ĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES I found the CentOS container repository on Docker Hub: ĭid it do anything? It looks like it did something. I ran through a couple tutorials on the Docker docs site and created a account to get some basic familiarity. I’ve thought for years that containerization is a great idea, but I haven’t actually done anything with containers yet.

Centos 7 docker install