Hadoop是否将本地文件复制到HDFS? [英] Hadoop copying local file to HDFS?

问题描述

我正在尝试将名为"afile"的本地文件复制到HDFS.所以我运行了以下命令:

I'm trying to copy a local file called 'afile' to the HDFS. So I ran the following command:

'hadoop fs -copyFromLocal/home/neo/afile in'或"hadoop fs -put/home/neo/afile in"

'hadoop fs -copyFromLocal /home/neo/afile in' or 'hadoop fs -put /home/neo/afile in'

但是，它说:文件/home/neo/afile不存在"

However, it says: 'File /home/neo/afile does not exist'

然后，我将文件"afile"放入hadoop下的目录中.现在，copyFromLocal成功.但是，文件"in"为空，因为我运行了显示"hadoop fs-ls"

Then I put the file 'afile' into the directory under hadoop. Now the copyFromLocal succeeded. However, the file 'in' is empty, since I run 'hadoop fs - ls', it shows

'-rw-r--r--'1 neo supergroup 0 2015-04-06 17:45/user/neo/in

'-rw-r--r--' 1 neo supergroup 0 2015-04-06 17:45 /user/neo/in

我也尝试过'hadoop fs -cat in'，什么也没返回.

I also tried 'hadoop fs -cat in', nothing returned.

有人可以帮忙吗?

谢谢！

推荐答案

1. 在/home/neo/

向 test.txt 添加内容:回显"wordcount的示例文本">/home/neo/test.txt

使用以下命令在hdfs中创建新目录:hadoop fs -mkdir/user/neo/in/

Create a new directory in hdfs using: hadoop fs -mkdir /user/neo/in/

将文件从本地目录复制到HDFS: hadoop fs -copyFromLocal/home/neo/test.txt/user/neo/in/test.txt

Copy file from local directory to HDFS: hadoop fs -copyFromLocal /home/neo/test.txt /user/neo/in/test.txt

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