centos7下安装docker

在CentOS 7上安装Docker，可以按照以下步骤进行操作：

1. 首先，使用以下命令安装Docker镜像：

   docker pull centos:7

2. 接下来，重启Docker服务以应用更改：

   service docker restart

3. 如果之前已经安装过旧版本的Docker，可以使用以下命令进行卸载：

   yum remove docker docker-common docker-selinux docker-engine

这样，在CentOS 7上就成功安装了Docker。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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