centOS安装docker

CentOS安装Docker的步骤如下：

1. 卸载旧版本的Docker（如果有）：sudo yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine

2. 安装必要的依赖包：sudo yum install -y yum-utils device-mapper-persistent-data lvm2

3. 添加Docker的yum源：sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

4. 安装Docker：sudo yum install docker-ce docker-ce-cli containerd.io

5. 启动Docker并设置开机自启：sudo systemctl start docker && sudo systemctl enable docker

6. 验证Docker是否安装成功：sudo docker run hello-world