docker ubuntu server 20.04 code example
Example 1: install docker on ubuntu 20.04
sudo apt install docker.io
Example 2: docker install in ubuntu 20.04
$ echo \
"deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null