安装docker －－linux

https://docs.docker.com/engine/installation/linux/centos/

curl -fsSL https://test.docker.com/ | sh

Install with the script

1. Log into your machine as a user with sudo or root privileges.

2. Make sure your existing packages are up-to-date.

   $ sudo yum update
   

3. Run the Docker installation script.

   $ curl -fsSL https://get.docker.com/ | sh
   

   This script adds the docker.repo repository and installs Docker.

4. Enable the service.

   $ sudo systemctl enable docker.service
   

5. Start the Docker daemon.

   $ sudo systemctl start docker
   

6. Verify docker is installed correctly by running a test image in a container.

   $ sudo docker run hello-world
   

问题1:

解决办法：需要启动下docker的服务

$ sudo systemctl enable docker.service

$ sudo systemctl start docker