ubuntu 16 vs 18 for docker code example

Example 1: intall docker ubuntu command

$ sudo apt-get update
 $ sudo apt-get install docker-ce docker-ce-cli containerd.io

Example 2: docker install ubuntu

$ sudo apt-get update

$ sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

Example 3: install docker linux

sudo apt-get install -y xserver-xorg-lts-trusty libgl1-mesa-glx-lts-trusty

Example 4: docker ubuntu installation

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