Docker Ubuntu 21.10 Installation – Step-by-step

Installing

2. 2. Preinstallation Testing

   Check if a Previous Docker Version is Installed
   With:

   which docker

   If Yes then Remove that with:

   sudo apt remove docker docker-engine

3. 3. Installing Packages

   Install PreRequisite Packages.

   sudo apt install apt-transport-https ca-certificates software-properties-common  
   

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

4. 5. Setting Up Docker CE Repo

   How to Setup the Docker CE Apt Repository

   Docker Repo Setup

   Docker CE Apt Repo

5. 6. Installing Docker CE

   Then to Install Docker CE
   Simply run:

   sudo apt install docker-ce