Docker installation

Enable Docker repository on CentOS/Red Hat

dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

Install Docker

dnf install docker-ce --nobest -y

After installing Docker, remember to configure the service to automatically start

chkconfig docker on ; service docker start
systemctl enable docker ; systemctl start docker 

Install Docker Compose

curl -L "https://github.com/docker/compose/releases/download/1.25.0/docker-compose-$(uname -s)-$(uname -m)" \ 
 -o /usr/local/bin/docker-compose ; chmod +x /usr/local/bin/docker-compose

On Debian/Ubuntu systems do instead

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
apt-update ; apt install docker-ce

If you stick with podman on Red Hat, just create an alias:

alias docker=podman