That make up an executable software application. If you need more help on any, just type: docker -help Docker Images #Ī Docker image is made up of a series of layers representing instructions in the image’s Dockerfile You can list all available commands by typing docker with no parameters: docker The docker command line take the following form: docker Now that we have a working Docker installation, let’s go over the basic syntax of the docker CLI. This message shows that your installation appears to be working correctly. Status: Downloaded newer image for hello-world:latest It in a container, print a “Hello from Docker” message and exit: docker container run hello-world To verify Docker is installed successfully and that you can run docker commands without sudo, issue the following command which will download a test image, run Log out and log back in so that the group membership is refreshed. You can do that by typing: sudo usermod -aG docker $USER Which is created during the installation of the Docker CE package. You need to add your user to the docker group If you want to run Docker commands as a non-root user without prepending sudo └─2498 docker-containerd -config /var/run/docker/containerd/containerd.tomlĪt the time of writing, the current stable version of Docker is, 18.06.1, to print the Docker version type: docker -v Docker version 18.06.1-ce, build e68fc7aĮxecuting the Docker Command Without Sudo #īy default, managing Docker requires administrator privileges. Loaded: loaded (/usr/lib/systemd/system/rvice enabled vendor preset: disabled)Īctive: active (running) since Wed 08:51:20 UTC 7s ago
The output should look something like this: To verify that the Docker service is running type: sudo systemctl status docker Once the Docker package is installed, start the Docker daemon and enable it to automatically start at boot time: sudo systemctl start docker sudo systemctl enable docker
Now that the Docker repository is enabled, install the latest version of Docker CE (Community Edition) using yum by typing: sudo yum install docker-ce Next, run the following command which will add the Docker stable repository to your system: sudo yum-config-manager -add-repo
Start by updating your system packages and install the required dependencies: sudo yum update sudo yum install yum-utils device-mapper-persistent-data lvm2 To install Docker on your CentOS 7 server follow the steps below: The recommended approach is to install Docker from the Docker’s repositories. You check this guideĪlthough the Docker package is available in the official CentOS 7 repository, it may not always be the latest version.
In this tutorial, we’ll go through how to install Docker CE on CentOS 7 and explore the basic Docker concepts and commands. Docker is a containerization technology that allows you to quickly build, test and deploy applications as portable, self-sufficient containers that can run virtually anywhere.