how to install docker ubuntu 20.04 code example
Example 1: install docker on ubuntu 18.04
sudo apt install docker-ce
https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04
Example 2: install docker on ubuntu 20.04
sudo apt install docker.io
Example 3: install docker on ubuntu 20.04
$ sudo apt-get update
$ sudo apt-get install \
apt-transport-https \
ca-certificates \
curl \
gnupg \
lsb-release
Example 4: install docker on ubuntu 18.04
sudo apt update
Example 5: apt install docker
$ sudo apt-get remove docker docker-engine docker.io containerd runc