如图：
解决：
方法一：修改Hadoop配置文件hdfs-site.xml 里的权限。
最后一步：重启hdfs组件。
方法二：
方法三：su hdfs 查看user的权限，修改权限为777.
查看/user下面具体用户的权限，我这里为了以后不出现错误，直接将所有用户权限都设置为777
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