Install Docker on Ubuntu 18.04

To install Docker on Ubuntu 18.04, run

apt install docker.io

On 2018-02-28, the repository have docker version 17.03-2-ce

root@ok-vm:~# docker version
Client:
 Version:      17.03.2-ce
 API version:  1.27
 Go version:   go1.9.4
 Git commit:   f5ec1e2
 Built:        Tue Feb 20 21:53:05 2018
 OS/Arch:      linux/amd64

Server:
 Version:      17.03.2-ce
 API version:  1.27 (minimum version 1.12)
 Go version:   go1.9.4
 Git commit:   f5ec1e2
 Built:        Tue Feb 20 21:53:05 2018
 OS/Arch:      linux/amd64
 Experimental: false
root@ok-vm:~# 

Add your user in docker group

sudo usermod -aG docker YOUR_USER_NAME