When the Docker daemon starts, it opens a Unix socket for the docker group members.īefore continuing, make sure you have a limited user account that does not belong to the sudo group. This message shows that your installation appears to be working correctly.īy default, sudo is required to run Docker commands, but a new group, called docker, was created during installation. Among other text, the output should include a message similar to the following: Hello from Docker! If successful, Docker should download and run the hello-world image and output a success message. Verify Docker is correctly installed by running the “hello-world” image. This is recommended if you intend on running a production application within this Docker installation. Optionally configure Docker to start when the server boots up. Verify these details and enter y to accept.Īdditional installation instructions for these distributions can be found within Docker’s documentation:Īfter Docker Engine is installed, start Docker and verify everything is working by running a test image.Įnsure that the Docker server is running.

Install Docker Engine and other required packages: sudo yum install docker-ce docker-ce-cli containerd.ioĭuring this step, you may be prompted to accept the GPG key. In the following command, replace with the url of the repository for your distribution: sudo yum-config-manager -add-repo

This automatically maps to the dnf config-manager command when using DNF. sudo yum install yum-utilsĪdd the docker repository, using yum-config-manager. This will automatically install dnf-plugins-core when using DNF. Install the yum-utils package, which includes yum-config-manager. sudo yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine Output indicating that any of the packages aren’t found can be safely ignored. As such, these instructions still work as intended.Įnsure Docker is not currently installed. While the YUM package manager has been replaced with DNF on CentOS 8 and Fedora, the yum command is still present as a symlink to DNF.

Docker install centos 7