Install Basics

Install Docker and Docker Compose
To install Docker-CE (Community Edition) and Docker Compose, you can open the terminal, or SSH into your host system, then use the command  

 curl https://get.docker.com | sh 

 You'll be prompted to enter you super user password, then the install should commence. 

 NOTE: If you are using a system without sudo installed, you should install it, as this command seems to require it, even if you're logged in as root, which you really shouldn't be. 

 If you happen to be using a Linux version that isn't supported by this one-liner command, you can find instructions to install Docker-CE and Docker Compose for your distro with a quick web search. 

 Finally, let's add our user to the docker group. This will allow us to use the docker and docker compose commands without using sudo every time. Use the command: 

 sudo usermod -aG docker <username> 

 Where you'll replace <username> with your actual name / username.  In my case I would use 

 sudo usermod -aG docker brian 

 Now, you can either log out and back in to get the new group to take effect, or you can use the command: 

 newgrp && newgrp docker 

 which will allow you to act as part of the docker group temporarily until you can log out and back in later.

Create a Non-Root User with sudo Privileges
Add a Non-Root User 

 On Ubuntu / Debian based systems, creating a non-root user with sudo privileges is quite straight forward.  

 First, we'll create our non-root user with the command 

 adduser <username> 

 where you replace <username> above with your actual name or username.

 In my case I would do 

 adduser brian 

 Enter a strong password for your user, then confirm the password. Enter the additional information if you like, though it's not required. Finally, accept the settings with 'Y'. 

 Add the user to the sudo group 

 To add our user to the sudo group we'll use the command: 

 usermod -aG sudo <username> 

 Where, again, you'll replace <username> with your name or username.  In my case it would be 

 usermod -aG sudo brian 

 Now, you can log out and log back in as your new non-root user.