參考：http://www.docker.org.cn/book/install/install-docker-on-rhel-29.html

環境：Centos 或 Redhat

1、檢查依賴包

# uname -r 3.10.0-862.9.1.el7.x86_64

Docker需要一個64位系統的紅帽系統，核心的版本必須大於3.10。可以用下面的命令來檢查是否滿足docker的要求。2、更新yum包 # sudo yum update 

3、安裝docker # sudo yum install docker-engine

一般Linux系統自帶docker，這步可以忽略，或者已安裝再執行安裝會提示已安裝，若預設自帶的docker不符合需要可以解除安裝再進行安裝

4、啟動docker服務 # sudo service docker start 

5、確認docker安裝成功 # docker run hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world d1725b59e92d: Pull complete  Digest: sha256:0add3ace90ecb4adbf7777e9aacf18357296e799f81cabc9fde470971e499788 Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps:  1. The Docker client contacted the Docker daemon.  2. The Docker daemon pulled the "hello-world" image from the Docker Hub.     (amd64)  3. The Docker daemon created a new container from that image which runs the     executable that produces the output you are currently reading.  4. The Docker daemon streamed that output to the Docker client, which sent it     to your terminal.

To try something more ambitious, you can run an Ubuntu container with:  $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:  https://hub.docker.com/

For more examples and ideas, visit:  https://docs.docker.com/get-started/

 顯示latest: Pulling from library/hello-world說明是去倉庫拉取映象了，驗證安裝成功