how to start docker on ubuntu code example

Example 1: how to install docker ubuntu

sudo apt-get update
sudo apt-get upgrade
sudo apt install docker.io
systemctl start docker
systemctl enable docker
docker --version

Example 2: install docker ubuntu

$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

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Example 3: docker ubuntu installation

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Example 4: install docker on ubuntu with

$ sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"