配置yum源

使用以下命令下载CentOS官方的yum源文件
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

清除yum缓存
yum clean all
更新yum缓存
yum makecache
测试新的yum源
yum list

Docker的自动化安装

curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
Docker启动
systemctl start docker
通过运行hello-world镜像来验证是否正确安装了Docker Engine-Community。
拉取镜像
sudo docker pull hello-world
执行hello-world
sudo docker run hello-world

[root@localhost mm]# docker run hello-worldHello 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 theexecutable that produces the output you are currently reading.4. The Docker daemon streamed that output to the Docker client, which sent itto your terminal............................

一些其他启动相关的命令：

守护进程重启：systemctl daemon-reload
重启Docker服务：systemctl restart docker / service docker restart
关闭Docker服务：docker service docker stop / docker systemctl stop docker