Here is an easy way to install Docker.
STEP 1. Download and install docker with the following command.
curl -fsSL https://get.docker.com/ | sh
STEP 2. Start docker.
systemctl start docker
STEP 3. By default, the Docker won’t start after rebooting your machine. To make sure that it starts every time after reboot – use the following command.
systemctl enable docker
NOTE: If this method doesn’t work on your distribution, check the official documentation.