CentOS7安装docker

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1.系统工具

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

2.设置阿里的镜像

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3.更新安装Docker-CE

sudo yum makecache fast
sudo yum -y install docker-ce

4.更新各种插件

yum update 
yum install docker 

5.开启docker服务

systemctl start docker

6.hello world

yum update yum install docker systemctl start docker
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/

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