Hadoop HDFS操作命令总结

Hadoop HDFS操作命令总结

1.列出根目录下所有的目录或文件

hadoop fs -ls /

2.列出/logs目录下的所有目录和文件

hadoop fs -ls /logs

3.列出/user目录及其子目录下的所有文件（谨慎使用）

hadoop fs -ls -R /user

4.创建/soft目录

hadoop fs -mkdir /soft

5.创建多级目录

hadoop fs -mkdir -p /apps/windows/2017/01/01

6.将本地的wordcount.jar文件上传到/wordcount目录下

hadoop fs -put wordcount.jar /wordcount

7.下载words.txt文件到本地

hadoop fs -get /words.txt

8.将/stu/students.txt文件拷贝到本地

hadoop fs -copyToLocal /stu/students.txt

9.将word.txt文件拷贝到/wordcount/input/目录

hadoop fs -copyFromLocal word.txt /wordcount/input

10.将word.txt文件从本地移动到/wordcount/input/目录下

hadoop fs -moveFromLocal word.txt /wordcount/input/

11.将/stu/students.txt拷贝一份为/stu/students.txt.bak

hadoop fs -cp /stu/students.txt /stu/students.txt.bak

12.将/flume/tailout/目录下的子目录或文件都拷贝到/logs目录（如果此目录不存在会创建）下

hadoop fs -cp /flume/tailout/ /logs

13.将/word.txt文件重命名为/words.txt

hadoop fs -mv /word.txt /words.txt

14.将/words.txt文件移动到/wordcount/input/目录下

hadoop fs -mv /words.txt /wordcount/input/

15.将/ws目录以及子目录和文件都删除（谨慎使用）

hadoop fs -rm -r /ws

16.删除以"xbs-"开头的目录及其子目录

hadoop fs -rm -r /xbs-*

17.将/wordcount/output2/目录下的a.txt文件删除

hadoop fs -rm /wordcount/output2/a.txt

18.将/wordcount/input/目录下面的所有文件都删除

hadoop fs -rm /wordcount/input/*

19.查看HDFS集群的磁盘空间使用情况

hadoop fs -df -h

20.查看/word.txt文件的内容

hadoop fs -cat /word.txt

21.将name.txt文件中的内容添加到/wordcount/input/words.txt文件中

hadoop fs -appendToFile name.txt /wordcount/input/words.txt

22.动态查看/wordcount/input/words.txt文件的内容

hadoop fs -tail -f /wordcount/input/words.txt

23.统计/flume目录总大小

hadoop fs -du -s -h /flume

24.分别统计/flume目录下各个子目录（或文件）大小

hadoop fs -du -s -h /flume/*

25.运行jar包中的程序

//hadoop jar + 要执行的jar包 + 要运行的类 + 输入目录 + 输出目录
hadoop jar wordcount.jar com.xuebusi.hadoop.mr.WordCountDriver /wordcount/input /wordcount/out

26.查看hdfs集群状态

hdfs dfsadmin -report

[root@hadoop01 hadoop]# hadoop fs
Usage: hadoop fs [generic options]
[-appendToFile <localsrc> ... <dst>]
[-cat [-ignoreCrc] <src> ...]
[-checksum <src> ...]
[-chgrp [-R] GROUP PATH...]
[-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
[-chown [-R] [OWNER][:[GROUP]] PATH...]
[-copyFromLocal [-f] [-p] [-l] <localsrc> ... <dst>]
[-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-count [-q] [-h] <path> ...]
[-cp [-f] [-p | -p[topax]] <src> ... <dst>]
[-createSnapshot <snapshotDir> [<snapshotName>]]
[-deleteSnapshot <snapshotDir> <snapshotName>]
[-df [-h] [<path> ...]]
[-du [-s] [-h] <path> ...]
[-expunge]
[-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-getfacl [-R] <path>]
[-getfattr [-R] {-n name | -d} [-e en] <path>]
[-getmerge [-nl] <src> <localdst>]
[-help [cmd ...]]
[-ls [-d] [-h] [-R] [<path> ...]]
[-mkdir [-p] <path> ...]
[-moveFromLocal <localsrc> ... <dst>]
[-moveToLocal <src> <localdst>]
[-mv <src> ... <dst>]
[-put [-f] [-p] [-l] <localsrc> ... <dst>]
[-renameSnapshot <snapshotDir> <oldName> <newName>]
[-rm [-f] [-r|-R] [-skipTrash] <src> ...]
[-rmdir [--ignore-fail-on-non-empty] <dir> ...]
[-setfacl [-R] [{-b|-k} {-m|-x <acl_spec>} <path>]|[--set <acl_spec> <path>]]
[-setfattr {-n name [-v value] | -x name} <path>]
[-setrep [-R] [-w] <rep> <path> ...]
[-stat [format] <path> ...]
[-tail [-f] <file>]
[-test -[defsz] <path>]
[-text [-ignoreCrc] <src> ...]
[-touchz <path> ...]
[-usage [cmd ...]]

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