Hadoop HDFS操作命令总结

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

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@hadoop03 apps]# hdfs dfsadmin -reportConfigured Capacity: 55737004032 (51.91 GB)Present Capacity: 15066578944 (14.03 GB)DFS Remaining: 14682021888 (13.67 GB)DFS Used: 384557056 (366.74 MB)DFS Used%: 2.55%Under replicated blocks: 7Blocks with corrupt replicas: 0Missing blocks: 0-------------------------------------------------Live datanodes (3):Name: 192.168.71.11:50010 (hadoop01)Hostname: hadoop01Decommission Status : NormalConfigured Capacity: 18579001344 (17.30 GB)DFS Used: 128180224 (122.24 MB)Non DFS Used: 16187543552 (15.08 GB)DFS Remaining: 2263277568 (2.11 GB)DFS Used%: 0.69%DFS Remaining%: 12.18%Configured Cache Capacity: 0 (0 B)Cache Used: 0 (0 B)Cache Remaining: 0 (0 B)Cache Used%: 100.00%Cache Remaining%: 0.00%Xceivers: 1Last contact: Mon Jan 09 11:17:43 PST 2017Name: 192.168.71.13:50010 (hadoop03)Hostname: hadoop03Decommission Status : NormalConfigured Capacity: 18579001344 (17.30 GB)DFS Used: 128196608 (122.26 MB)Non DFS Used: 13623074816 (12.69 GB)DFS Remaining: 4827729920 (4.50 GB)DFS Used%: 0.69%DFS Remaining%: 25.98%Configured Cache Capacity: 0 (0 B)Cache Used: 0 (0 B)Cache Remaining: 0 (0 B)Cache Used%: 100.00%Cache Remaining%: 0.00%Xceivers: 1Last contact: Mon Jan 09 11:17:41 PST 2017Name: 192.168.71.12:50010 (hadoop02)Hostname: hadoop02Decommission Status : NormalConfigured Capacity: 18579001344 (17.30 GB)DFS Used: 128180224 (122.24 MB)Non DFS Used: 10859806720 (10.11 GB)DFS Remaining: 7591014400 (7.07 GB)DFS Used%: 0.69%DFS Remaining%: 40.86%Configured Cache Capacity: 0 (0 B)Cache Used: 0 (0 B)Cache Remaining: 0 (0 B)Cache Used%: 100.00%Cache Remaining%: 0.00%Xceivers: 1Last contact: Mon Jan 09 11:17:42 PST 2017

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27.查看hadoop fs命令使用帮助

[root@hadoop01 hadoop]# hadoop fsUsage: hadoop fs [generic options] [-appendToFile ... ] [-cat [-ignoreCrc] ...] [-checksum ...] [-chgrp [-R] GROUP PATH...] [-chmod [-R] PATH...] [-chown [-R] [OWNER][:[GROUP]] PATH...] [-copyFromLocal [-f] [-p] [-l] ... ] [-copyToLocal [-p] [-ignoreCrc] [-crc] ... ] [-count [-q] [-h] ...] [-cp [-f] [-p | -p[topax]] ... ] [-createSnapshot []] [-deleteSnapshot ] [-df [-h] [ ...]] [-du [-s] [-h] ...] [-expunge] [-get [-p] [-ignoreCrc] [-crc] ... ] [-getfacl [-R] ] [-getfattr [-R] {-n name | -d} [-e en] ] [-getmerge [-nl] ] [-help [cmd ...]] [-ls [-d] [-h] [-R] [ ...]] [-mkdir [-p] ...] [-moveFromLocal ... ] [-moveToLocal ] [-mv ... ] [-put [-f] [-p] [-l] ... ] [-renameSnapshot ] [-rm [-f] [-r|-R] [-skipTrash] ...] [-rmdir [--ignore-fail-on-non-empty]