docker na elementaryos

#!/bin/bash
sudo apt-get install software-properties-common
sudo apt-get install apt-transport-https ca-certificates -y
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 7EA0A9C3F273FCD8
sudo rm -f /etc/apt/sources.list.d/docker.list
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update
sudo apt-get purge lxc-docker

sudo apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual
sudo apt-get install docker-ce
sudo service docker start

sudo groupadd docker
sudo usermod -aG docker $USER