Merge pull request liuyi01#1 from hans008/patch-1

Update 1-pre.md
KLines · Jan 30, 2019 · ba0aeb5 · ba0aeb5
2 parents 9153c8a + 4cdea0b
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 ## 2. 安装docker（所有节点）
 一般情况使用下面的方法安装即可
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+docker安装可参照[阿里云的文档](https://help.aliyun.com/document_detail/60742.html?spm=5176.11065259.1996646101.searchclickresult.261ebdd3Qy7wLJ)
 #### 2.1 卸载旧版本(如果有的话)
 ```bash
 $ apt-get remove docker docker-engine docker.io