一、Uninstall old versions

Older versions of Docker were called docker or docker-engine. If these are installed, uninstall them:

         執行命令：sudo apt-get remove docker docker-engine docker.io

二、Install by DEB package

1. Install Docker CE, changing the path below to the path where you downloaded the Docker package.

   $ sudo dpkg -i /path/to/package.deb
   

   The Docker daemon starts automatically.

2. Verify that Docker CE is installed correctly by running the hello-world image.

   $ sudo docker run hello-world

三、Post config

To create the  docker group and add your user:

1. Create the docker group

   $ sudo groupadd docker
   

2. Add your user to the docker group

   $ sudo usermod -aG docker $USER
   

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

   If testing on a virtual machine, it may be necessary to restart the virtual machine for changes to take effect.

   On a desktop Linux environment such as X Windows, log out of your session completely and then log back in.

4. Verify that you can run docker commands without sudo

   $ docker run hello-world

docker commit id  name(Registry大頭的)