Installing Docker

Before installing Docker, it will require the updated packages:

$ sudo apt-get update

Use the following command to add the GPG key for the official Docker repository to the system:

$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D