HDFS常用shell命令

注，其实常用命令不用网上搜，和linux下的命令很类似，触类旁通，直接在linux 上 hadoop fs 看一下就行了，不需要刻意去记
我把 linux 上的 help 列举下，方便直接看吧，hdfs dfs 与 hadoop fs 效果一样
常用的就是
hdfs dfs -copyFromLocal /local/data /hdfs/data：将本地文件上传到 hdfs 上（原路径只能是一个文件）
hdfs dfs -put /tmp/ /hdfs/ ：和 copyFromLocal 区别是，put 原路径可以是文件夹等
hadoop fs -ls / ：查看根目录文件
hadoop fs -ls /tmp/data：查看/tmp/data目录
hadoop fs -cat /tmp/a.txt ：查看 a.txt，与 -text 一样
hadoop fs -mkdir dir：创建目录dir
hadoop fs -rmr dir：删除目录dir

 [orco@node1 sbin]$ 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]
     [-find <path> ... <expression> ...]
     [-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> ...]
     [-truncate [-w] <length> <path> ...]
     [-usage [cmd ...]]