ssh: Name or service not known

ssh: Could not resolve hostname DataNode1: Name or service not known

搭建hadoop集羣過程當中 ssh鏈接其餘節點時

ssh hadoop@DataNode1

報錯  ssh: Could not resolve hostname DataNode1: Name or service not known

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解決：

linux主機名的相關配置文件就是/etc/hosts

這個文件裏不光要配置本機ip和主機名，還要配置鏈接節點的ip和主機名