how to run docker daemon on ubuntu code example

Example 1: how to stop docker in ubuntu

sudo systemctl stop docker
#To stop docker from terminal.

Example 2: 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 3: Start the Docker daemon

sudo systemctl start docker
sudo service docker start

Example 4: install docker in ubuntu

$ sudo apt-get remove docker docker-engine docker.io
$ sudo apt-get update
$ sudo apt install docker.io
$ sudo snap install docker
$ docker --version

Example 5: install docker on ubuntu with

$ sudo apt-key fingerprint 0EBFCD88

pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ unknown] Docker Release (CE deb) <[email protected]>
sub   rsa4096 2017-02-22 [S]