recap basic command(hadoop)

file operations

hdfs fs -ls

hdfs fs -lsr 包括子目录文件

hdfs fs -rmr

bin/hadoop fs -put path1 path2 上传hdfs 下path1 到本机 path2

bin/hadoop fs -get path1 path2 下载hdfs 下path1 到本机 path2

bin/hadoop dfs -copyFromLocal 源路径路径

bin/hadoop dfs -getmerge

hadoop fs -du URI [URI …] 显示目录中所有文件的大小

hadoop fs -expunge 清空回收站

management and update

hdfs dfsadmin -report 查看HDFS的基本统计信息

hdfs dfsadmin -safemode leave 退出safemode safemode下文件不允许修改

start-balacer.sh 负载

mr job

bin/hadoop jar *.jar [jobMainClass] [jobArgs] 运行MRjob

bin/hadoop job -kill job_201005310937_0053

http://hadoop.apache.org/docs/r1.0.4/cn/hdfs_shell.html

bin/hadoop 查看更多命令

Most commands print help when invoked w/o parameters.

时间： 2024-10-12 18:37:59

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