1、修改$hadoop/etc/hadoop/core-site.xml文件
添加
<property>
<name>fs.trash.interval</name>
<value>分钟</value>
<description>Number of minutes after which the checkpoint
gets deleted. If zero, the trash feature is disabled.
This option may be configured both on the server and the
client. If trash is disabled server side then the client
side configuration is checked. If trash is enabled on the
server side then the value configured on the server is
used and the client configuration value is ignored.
</description>
</property>
主要是修改value值，它是以分钟进行计算。时间到了就会清理掉文件。若不进行配置默认值是0，直接删除。
2、使用工具 notepad++
说明：使用notepad++文本工具可以直接编辑hadoop的配置文件，它会自动上传修改内容
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