how to start docker in ubuntu

C++
sudo apt-get update
sudo apt-get upgrade
sudo apt install docker.io
systemctl start docker
systemctl enable docker
docker --versionsudo apt install docker.io$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

<output truncated>
systemctl start docker
# to start docker from terminal
Source

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