title: install docker
How to install docker by yum.
yum install yum-utils -y
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install docker-ce-19.03.9-3.el7 docker-ce-cli-19.03.9-3.el7 containerd.io docker-compose-plugin -y
systemctl start docker
docker version