Linux post-installation steps for Docker Engine

To create the docker group and add your user:

1. Create the docker group.

   Copysudo groupadd docker
   

2. Add your user to the docker group.

   Copysudo usermod -aG docker $USER
   

3. Log out and log back in so that your group membership is re-evaluated.

   If you're running Linux in a virtual machine, it may be necessary to restart the virtual machine for changes to take effect.

   You can also run the following command to activate the changes to groups:

   Copynewgrp docker
   

4. Verify that you can run docker commands without sudo.

   Copydocker run hello-world
   

   This command downloads a test image and runs it in a container. When the container runs, it prints a message and exits.