docker for centos 安装文档链接:https://docs.docker.com/engine/install/centos/
如果机器安装了旧版本docker,需先执行卸载操作
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分别执行以下命令安装repositories
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Optional可跳过安装,如需安装请参考以下命令
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INSTALL DOCKER ENGINE(安装最新docker版本)
$ sudo yum install docker-ce docker-ce-cli containerd.io
Start Docker(启动docker)
$ sudo systemctl start docker
校验docker是否安装成功(当返回以下信息,说明安装成功)
$ docker run hello-world
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